Author: claimsbot

What is claimed is:

1. A lighting string with extending lighting structure including an electrical wire and several bulb assemblies connected on the electrical wire in interval, wherein the characteristic is some of the bulb assembly has only a bulb holder to engage with a joint of a lighting structure, which includes a base and a shell to receive therein an IC board having several bulbs thereon to become a lighting unit; and an extending wire having one end connected with the said joint and the other end connected with the said IC board for conductive connection that makes the lighting unit being far from the electrical.
2. The lighting string with extending lighting structure as claimed in claim 1, wherein a sleeve is received in the shell above the bulb on the IC board for centralizing the emitted light of the lighting unit.
3. The lighting string with extending lighting structure as claimed in claim 1, wherein a sleeve is received in the shell while a bunch of lighting fiber or a transparent patterned decoration can be connected with the sleeve.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A compound having the following structural formula (I):
in which:
R2 is an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical, a heterocyclic radical, a 9-fluorenylmethyl radical or a radical of formula (CH2)m(NR5)n(C(O,N))pR6;
R5, R6, m, n and p are as defined below;
R5 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical or a heterocyclic radical,
R6 is:
an alkyl radical having from 1to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical, a heterocyclic radical,
a radical
or a radical NR\u2032(CH2)vR10;

where R10, R\u2032, R\u2033and v are as defined below;
m has the values 0, 1 or 2;
n and p have the values 0 or 1;
v has the values 1, 2 or 3;
R10 is an alkyl radical having from 1to 12 carbon atoms, an aryl, aralkyl, heteroaryl or heterocyclic radical, a radical NH-CO-R12, a radical NH\u2014CO\u2014O\u2014R12 or C-R12R13 or a radical N-R12R13, wherein R12 and R13 are as defined below;
R\u2032 is a hydrogen atom, an alkyl radical having from 1to 12 carbon atoms, a heteroaryl radical or a heterocyclic radical;
R\u2033 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, optionally substituted with one or more halogens, a heteroaryl radical, a heterocyclic radical, a radical (CH2)v-R10, or a radical NHR10 or NR10R10;
R12 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical or a heterocyclic radical;
R13 is a hydrogen atom or an alkyl radical having from 1 to 12 carbon atoms;
T is an oxygen or sulfur atom; and
Ar1 and Ar2, which may be identical or different, are each an optionally substituted aromatic radical of one of the formulae:
wherein A is an S or O atom or a radical N-R13, with the proviso that, when Ar1or Ar2 is a
radical, then Ar2 or Ar1 is not a
radical, or an optical or geometrical isomer or salt thereof.
2. A compound as defined by claim 1, wherein formula (I), Ar1 and Ar2, which may be identical or different, are each one of the unsubstituted radicals:
with the proviso that, when Ar1 or Ar2 is a
radical, then Ar2 or Ar1 is
not a
radical.
3. A compound as defined by claim 1, in the form of a carboxylic acid salt, an organic amine salt or a salt of an amine function.
4. A compound as defined by claim 3, in the form of an alkali metal or alkaline-earth metal salt, an amino acid salt, a salt of a halogen atom or an organic acid or nitrate salt.
5. A compound as defined by claim 1, comprising at least one linear or cyclic, saturated or unsaturated, optionally branched, hydrogen-containing or fluorine-containing alkyl radical having 1 to 12 carbon atoms, which may be interrupted with a hetero atom.
6. A compound as defined by claim 1, comprising at least one phenyl, biphenyl, cinnamyl or naphthyl radical, which may be mono- or disubstituted with a halogen atom, a CF3 radical, an alkyl radical having from 1 to 12 carbon atoms, an alkoxy radical having from 1 to 7 carbon atoms, a nitro function, a polyether radical, an aryl radical, a benzoyl radical, an alkyl ester group, a carboxylic acid, a hydroxyl radical optionally protected with an acetyl or benzoyl group or an amino function optionally protected with an acetyl or benzoyl group or optionally substituted with at least one alkyl radical having from 1 to 12 carbon atoms.
7. A compound as defined by claim 1, comprising at least one benzyl, phenethyl or 2-naphthylmethyl radical, which may be mono- or disubstituted with a halogen atom, a CF3 radical, an alkyl radical having from 1 to 12 carbon atoms, an alkoxy radical having from 1 to 7 carbon atoms, a nitro function, a polyether radical, an aryl radical, a benzoyl radical, an alkyl ester group, a carboxylic acid, a hydroxyl radical optionally protected with an acetyl or benzoyl group or an amino function optionally protected with an acetyl or benzoyl group or optionally substituted with at least one alkyl radical having from 1 to 12 carbon atoms.
8. A compound as defined by claim 1, comprising at least one pyridyl, furyl, thienyl, isoxazolyl, oxadiazolyl, oxazolyl, isothiazolyl, quinazolinyl, benzothiadiazolyl, benzimidazolyl, quinoxalyl, indolyl or benzofuryl radical, optionally substituted with at least one halogen, an alkyl radical having from 1 to 12 carbon atoms, an alkoxy radical having from 1 to 7 carbon atoms, an aryl radical, a nitro function, a polyether radical, a heteroaryl radical, a benzoyl radical, an alkyl ester group, a carboxylic acid, a hydroxyl optionally protected with an acetyl or benzoyl group or an amino function optionally protected with an acetyl or benzoyl group or optionally substituted with at least one alkyl radical having from 1 to 12 carbon atoms.
9. A compound as defined by claim 1, comprising at least one morpholino, piperidino, piperazino, 2-oxo-1-piperidyl or 2-oxo-1-pyrrolidinyl radical, optionally substituted with at least one alkyl radical having from 1 to 12 carbon atoms, an alkoxy radical having from 1 to 7 carbon atoms, an aryl radical, a nitro function, a polyether radical, a heteroaryl radical, a benzoyl radical, an alkyl ester group, a carboxylic acid, a hydroxyl optionally protected with an acetyl or benzoyl group or an amino function optionally protected with an acetyl or benzoyl group or optionally substituted with at least one alkyl radical having from 1 to 12 carbon atoms.
10. A compound as defined by claim 1, comprising at least one halogen atom selected from the group consisting of a fluorine atom, a chlorine atom and a bromine atom.
11. A compound as defined by claim 1, selected from the group consisting of:
2(S)-Ethoxy-3-{4-2-(3-heptyl-1-methylureido)thiazol-4-ylphenyl}propanoic acid
2(S)-Ethoxy-3-{4-2-(3-pentyl-1-methylureido)thiazol-5-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{6-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium chloride,
2(S)-Ethoxy-3-{4-5-(3-heptyl-1-methylureido)-2-methyl-2H-1,2 ,4triazol-3-ylphenyl}propanoic acid,
2-Ethoxy-3-{6-3-(3-heptyl-1-methylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{6-3-(3-heptyl-1-methylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride,
3-{4-6-(3-Butyl-1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-phenethylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-phenylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-naphthalen-2-ylureido)pyrid-2-ylphenyl}propanoic acid,
3-{4-6-(3-Cyclohexyl-1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-3-(3-heptyl-1-methylureido)phenylthiazol-2-yl}propanoic acid,
2(S)-Ethoxy-3-{4-3-(1-methyl-3-pentylureido)phenylthiazol-2-yl}propanoic acid,
2(S)-Ethoxy-3-{6-3-(1-methyl-3-pentylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-4-(6-{3-2-(4-fluorophenyl)ethyl- 1-methylureido}pyrid-2-yl)phenylpropanoic acid,
2(S)-Ethoxy-3-{4-8-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-4-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-4-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-2-(1-methyl-3-pentylureido)pyrid-4-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-2-(3-heptyl-1-methylureido)pyrid-4-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-2-(3-heptyl-1-methylureido)pyrimidin-4-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-2-(1-methyl-3-pentylureido)pyrimidin-4-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{5-3-(3-heptyl-1-methylureido)phenylfuran-2-yl}propanoic acid,
2(S)-Ethoxy-3-{5-3-(3-heptyl-1-methylureido)phenylthiophen-2-yl}propanoic acid,
2(S)-Ethoxy-3-{2-3-(3-heptyl-1-methylureido)phenylpyrimidin-5-yl}propanoic acid,
2(S)-Ethoxy-3-{8-3-(3-heptyl-1-methylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{4-5-(3-heptyl-1-methylureido)thiophen-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-5-(3-heptyl-1-methylureido)furan-2-ylphenyl}propanoic acid,
3-(6-{3-3-(4-Dimethylaminophenly)-1-methylureidophenyl}pyrid-3-yl)-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-6\u2032-(3-heptyl-1-methylureido)-2,2\u2032bipyridyl-5-ylpropanoic acid,
2(S)-Ethoxy-3-{5-3-(1-methyl-3-pentylureido)phenylpyrimidin-2-yl}propanoic acid,
2(S)-Ethoxy-3-{6-4-fluoro-3-(1-methyl-3-pentylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{2-fluoro-4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-5-(1-methyl-3-pentylureido)thiophen-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-5-(3-heptyl-1-methylureido)thiophen-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-6\u2032-(1-methyl-3-pentylureido)-2 ,2\u2032bipyridyl-5-ylpropanoic acid,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium fumarate,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium maleate,
2(S)-Ethoxy-3-(4-{4-1-methyl-3-(2-piperidin-1-yl-ethyl)-ureido-pyridin-2-yl}-phenyl)-propanoic acid,
2(S)-Ethoxy-3-(4-{4-1-methyl-3-(3-phenyl-propyl)-ureido-pyridin-2-y}-phenyl)-propanoic acid,
2(S)-Ethoxy-3-(4-{4-1-methyl-3-(4-phenyl-butyl)-ureido-pyridin-2-yl}-phenyl)-propanoic acid,
3-{4-4-(3-Benzo1,2,5thiadiazol-4-yl-1-methyl-ureido)-pyridin-2-yl-phenyl}-2(S)-ethoxy-propanoic acid,
3-(4-{4-3-(4-Dimethylamino-phenyl)-1-methyl-ureido-pyridin-2-yl}-phenyl)-2(S)-ethoxy-propanoic acid,
2(S)-Ethoxy-3-4-(4-{3-2-( 1H-imidazol-2-yl)-ethyl-1-methyl-ureido}-pyridin-2-yl)-phenyl-propanoic acid,
3-(4-{4-3-(2-Dimethylamino-ethyl)-1-methyl-ureido-pyridin-2-yl}-phenyl)-2(S)-ethoxy-propanoic acid,
2(S)-Ethoxy-3-{4-4-( I -methyl-3-naphthalen-2-yl-ureido)-pyridin-2-yl-phenyl}-propanoic acid,
3-{4-6-(3-Benzo1,2,5thiadiazol-4-yl-1-methyl-ureido)-pyridin-2-yl-phenyl}-2(S)-ethoxy-propanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(3-phenyl-propyl)-ureido-pyridin-2-yl}-phenyl)-propanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(2-piperidin-1-yl-ethyl)-ureido-pyridin-2-yl}-phenyl)-propanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(4-phenyl-butyl)-ureido-pyridin-2-yl}-phenyl)-propanoic acid,
3-(4-{6-3-(4-Dimethylamino-phenyl)-1-methyl-ureido-pyridin-2-yl}-phenyl)-2(S)-ethoxy-propanoic acid,
3-(4-{6-3-(2-Dimethylamino-ethyl)-1-methyl-u reido-pyridin-2-yl}-phenyl)-2(S)-ethoxy-propanoic acid,
2(S)-Ethoxy-3-4-(6-{3-2-(1H-imidazol-2-yl)-ethyl-1-methyl-ureido}-pyridin-2-yl)-phenyl-propanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentyl-thioureido)-pyridin-2-yl-phenyl}-propanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-heptyl-thioureido)-pyridin-2-yl-phenyl}-propanoic acid,
2(S)-Ethoxy-3-{6-3-(3-heptyl-1-methyl-thioureido)-phenyl-pyridin-3-yl}-propanoic acid,
2(S)-Ethoxy-3-{4-4-(3-heptyl-1-methyl-thioureido)-pyridin-2-yl-phenyl}-propanoic acid,
2(S)-Ethoxy-3-(6-{3-1-methyl-3-(2-piperidin-1-yl-ethyl)-ureido-phenyl}-pyridin-3-yl)-propanoic acid,
3-(6-{3-(2-Benzo1,2,5thiadiazol-4-yl-ethyl)-1-methyl-ureido-phenyl}-pyridin-3-yl)-2(S)-ethoxy-propanoic acid,
2(S)-Ethoxy-3-(6-{3-1-methyl-3-(3-phenyl-propyl)-ureido-phenyl}-pyridin-3-yl)-propanoic acid,
3-(6-{3-3-(4-Dimethylamino-phenyl)-1-methyl-ureido-phenyl}-pyridin-3-yl)-2(S)-ethoxy-propanoic acid.
12. A compound as defined by claim 1, having at least one of the following characteristics:
R2 is an alkyl, aryl or heteroaryl radical;
T is an oxygen atom;
at least one of Ar1 and Ar2 is a pyridine, thiazole, pyrimidine, thiophene or triazole radical.
13. A cosmetic composition, comprising a cosmetically effective amount of at least one compound as defined in claim 1, formulated into a cosmeticallyphysiologically acceptable support therefor.
14. The cosmetic composition as defined by claim 12, said at least one compound comprising from 0.001% to 3% by weight thereof.
15. The cosmetic composition as defined by claim 12, formulated for body or hair hygiene.
16. A pharmaceutical composition, comprising a pharmaceutically effective amount of at least one compound as defined in claim 1, formulated into a pharmaceuticallyphysiologically acceptable support therefor.
17. The pharmaceutical composition as defined in claim 16, said at least one compound comprising from 0.001% to 10% by weight thereof.
18. A compound having either of the following structural formulas:
wherein Ar1 in formula (Ia) is pyridyl, Ar2 in formula (Ib) is pyridyl, the depicted phenyl, Ar1 and Ar2 radicals are each optionally substituted, and R2 and T are as defined below;
R2 is an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical or a radical of formula (CH2)m(NR5)n(C(O,N))pR6; where R5, R6, m, n and p are as defined below;
R5 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, or an aralkyl radical;
R6 is:
an alkyl radical having from 1 to 12 carbon atoms, an aryl radical or an aralkyl radical,
a radical NR\u2032R\u2033
or a radical NR\u2032(CH2)vR10;

where R10, R\u2032, R\u2033 and v are as defined below;
R10 is an alkyl radical having from 1 to 12 carbon atoms, an aryl or aralkyl radical, a radical NH\u2014CO-R12, a radical NH\u2014CO\u2014O\u2014R12 or C\u2014R12R13 or a radical N\u2014R12R13, wherein R12 and R13 are as defined below;
R\u2032 is a hydrogen atom or an alkyl radical having from 1 to 12 carbon atoms;
R\u2033 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, optionally substituted with one or more halogens, a radical (CH2)v\u2014R10, or a radical NHR10 or NR10R10;
R12 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, or an aralkyl radical;
R13 is a hydrogen atom or an alkyl radical having from 1 to 12 carbon atoms;
m has the value 0, 1 or 2;
n and p each have the value 0 or 1;
v has the value 1, 2 or 3; and
T is an oxygen or sulfur atom; or an optical or geometrical isomer or salt thereof.
19. The compound of claim 18 wherein
T is an oxygen atom.
20. A compound as defined by claim 18, selected from the group consisting of:
2(S)-Ethoxy-3-{4-6-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid, 2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium chloride,
2-Ethoxy-3-{6-3-(3-heptyl-1-methylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{6-3-(3-heptyl-1-methylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{4-6-( 1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride,
3-{4-6-(3-Butyl-1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-phenethylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride,
2(S)-Ethoxy-3-{4-6-( 1-methyl-3-phenylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-naphthalen-2-ylureido)pyrid-2-ylphenyl}propanoic acid,
3-{4-6-(3-Cyclohexyl-1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{6-3-(1-methyl-3-pentylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-4-(6-{3-2-(4-fluorophenyl)ethyl-1-methylureido}pyrid-2-yl)phenylpropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-4-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-4-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-2-(1-methyl-3-pentylureido)pyrid-4-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-2-(3-heptyl-1-methylureido)pyrid-4-ylphenyl}propanoic acid, 3-(6-{3-3-(4-Dimethylaminophenyl)-1-methylureidophenyl}pyrid-3-yl)-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{6-4-fluoro-3-(1-methyl-3-pentylureido)phenylpyrid-3-yl}propanoic acid,
2(S)-Ethoxy-3-{2-fluoro-4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium fumarate,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium maleate, 2(S)-Ethoxy-3-(4-{4-1-methyl-3-(3-phenylpropyl)ureidopyridin-2-yl}phenyl)propanoic acid,
2(S)-Ethoxy-3-(4-{4-1-methyl-3-(4-phenylbutyl)ureidopyridin-2-yl}phenyl)propanoic acid,
3-(4-{4-3-(4-Dimethylamino-phenyl)-1-methyl-ureidopyridin-2-yl}phenyl)-2(S)-ethoxy-propanoic acid,
3-(4-{4-3-(2-Dimethylaminoethyl)-1-methylureidopyridin-2-yl}phenyl)-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-4-(1-methyl-3-naphthalen-2-ylureido)pyridin-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(3-phenylpropyl)ureidopyridin-2-yl}phenyl)propanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(4-phenylbutyl)ureidopyridin-2-yl}phenyl)propanoic acid,
3-(4-{6-3-(4-Dimethylaminophenyl)-1-methylureidopyridin-2-yl}phenyl)-2(S)-ethoxypropanoic acid,
3-(4-{6-3-(2-Dimethylaminoethyl)-1-methylureidopyridin-2-yl}phenyl)-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentylthioureido)pyridin-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-6-( 1-methyl-3-heptylthioureido)pyridin-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{4-4-(3-heptyl-1-methylthioureido)pyridin-2-ylphenyl}propanoic acid, and
3-(6-{3-3-(2-Benzo1,2,5thiadiazol-4-ylethyl)-1-methylureidophenyl}pyridin-3-yl)-2(S)-ethoxypropanoic acid.
21. A compound having the following structural formula:
wherein the depicted phenyl and pyridyl radicals are each optionally substituted, and R2 and T are as defined below;
R2 is an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical or a radical of formula (CH2)m(NR5)n(C(O,N))pR6 where R5,R6, m, n and p are as defined below;
R5 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical or an aralkyl radical;
R6 is:
an alkyl radical having from 1 to 12 carbon atoms, an aryl radical or an aralkyl radical,
a radical
or a radical NR\u2032(CH2)vR10;
where R10, R\u2032, R\u2033and v are as defined below;

R1 is an alkyl radical having from 1 to 12 carbon atoms, an aryl or aralkyl radical, a radical NH\u2014CO\u2014R 12, a radical NH\u2014CO\u2014O\u2014R12 or C\u2014R12R13 or a radical N\u2014R12R13, wherein R12 and R13 are as defined below;
R\u2032 is a hydrogen atom or an alkyl radical having from 1 to 12 carbon atoms;
R\u2033 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, optionally substituted with one or more halogens, a heteroaryl radical, a heterocyclic radical, a radical (CH2)v-R10, or a radical NHR10 or NR10R10;
R12 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical or a heterocyclic radical;
R13 is a hydrogen atom or an alkyl radical having from 1 to 12 carbon atoms;
m has the value 0, 1 or 2;
n and p each have the value 0or 1;
v has the value 1,2 or 3; and
T is an oxygen or sulfur atom; or an optical or geometrical isomer or salt thereof.
22. The compound of claim 21 wherein
T is an oxygen atom.
23. A compound as defined by claim 21, selected from the group consisting of:
2(S)-Ethoxy-3-{4-8-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium chloride,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride,
3-{4-6-(3-Butyl-1-methylureido)pyrid-2-ylpheny}-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-phenethylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-phenylureido)pyrid-2-ylpheny}propanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-naphthalen-2-ylureido)pyrid-2-ylphenyl}propanoic acid,
3-{4-6-(3-Cyclohexyl- 1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-4-(6-{3-2-(4-fluorophenyl)ethyl-1-methylureido}pyrid-2-yl)phenylpropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2(S)-Ethoxy-3-{2-fluoro-4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium fumarate,
2-4-(2-Carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium maleate,
2(S)-Isopropoxy-3-{4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid,
3-{4-6-(3-Pentyl-1-methylureido)pyrid-2-ylphenyl}-2-methylpropanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(3-phenylpropyl)ureidopyridin-2-yl}phenyl)propanoic acid,
2(S)-Ethoxy-3-(4-{6-1-methyl-3-(4-phenylbutyl)ureidopyridin-2-yl}phenyl)propanoic acid,
3-(4-{6-3-(4-Dimethylamino-phenyl)-1-methylureido-pyridin-2-yl}phenyl)-2(S)-ethoxypropanoic acid,
3-(4-{6-3-(2-Dimethylaminoethyl)-1-methylureidopyridin-2-yl}phenyl)-2(S)-ethoxypropanoic acid,
2(S)-Ethoxy-3-{4-6-(1-methyl-3-pentylthioureido)pyridin-2-ylphenyl}propanoic acid, and
2(S)-Ethoxy-3-{4-6-(1-methyl-3-heptylthioureido)pyridin-2-yl-phenyl}propanoic acid.
24. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-6-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid.
25. The compound as defined by claim 1, which is 2-4-(2-carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium chloride.
26. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{6-3-(3-heptyl-1-methylureido)phenylpyrid-3-yl}propanoic acid.
27. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-6-(1-methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride.
28. The compound as defined by claim 1, which is 3-{4-6-(3-butyl-1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid.
29. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-6-(1-methyl-3-phenethylureido)pyrid-2-ylphenyl}propanoic acid hydrochloride.
30. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-6-( 1-methyl-3-phenylureido)pyrid-2-ylphenyl}propanoic acid.
31. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-6-(1-methyl-3-naphthalen-2-ylureido)pyrid-2-ylphenyl}propanoic acid.
32. The compound as defined by claim 1, which is 3-{4-6-(3-cyclohexyl-1-methylureido)pyrid-2-ylphenyl}-2(S)-ethoxypropanoic acid.
33. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-6-(1methyl-3-pentylureido)pyrid-2-ylphenyl}propanoic acid.
34. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-4-(3-heptyl-1-methylureido)pyrid-2-ylphenyl}propanoic acid.
35. The compound as defined by claim 1, which is 2(S)-ethoxy-3-{4-4-(1-methyl-3 pentylureido)pyrid-2-ylphenyl}propanoic acid.
36. The compound as defined by claim 1, which is 2-4-(2-carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium fumarate.
37. The compound as defined by claim 1, which is 2-4-(2-carboxy-2(S)-ethoxyethyl)phenyl-6-(3-heptyl-1-methylureido)pyridinium maleate.
38. A compound having the following structural formula (I):
in which:
R2 is an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical or a radical of formula (CH2)m(NR5)n(C(O,N))pR6
R5,R6, m, n and p are as defined below;
R5 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical or a heterocyclic radical;
R6 is:
an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, a heteroaryl radical, a heterocyclic radical, or
a radical
wherein R\u2032 and R\u2033 are as defined below;
m has the values 0, 1 or 2;
n and p have the values 0 or 1;
R\u2032 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, a heteroaryl radical or a heterocyclic radical;
R\u2033 is a hydrogen atom, an alkyl radical having from 1 to 12 carbon atoms, an aryl radical, an aralkyl radical, optionally substituted with one or more halogens, a heteroaryl radical or a heterocyclic radical;
R13 is a hydrogen atom or an alkyl radical having from 1 to 12 carbon atoms;
T is an oxygen or sulfur atom; and
Ar1 and Ar2, which may be identical or different, are each an optionally substituted aromatic radical of one of the formulae:
wherein A is an S or O atom or a radical N\u2014R13, with the proviso that, when Ar1 or Ar2 is a
radical, then Ar2 or Ar1 is not a
radical, or an optical or geometrical isomer or salt thereof.

1. A system for removing accumulations of ice and snow from the bottom of inlet muff of an auxiliary power unit (APU), comprising:
a gull wing fairing mounted within the inlet muff to direct inlet air into an inlet of the APU that has a plurality of perforations to allow air and liquid flow through the fairing into a stagnant air region of the inlet muff below the fairing;
a tracer line comprising tubing that is arranged along a surface of the fairing in a general \u201czigzag\u201d pattern that has an inlet coupled to a primary stream of high pressure hot air and an outlet to warm the fairing sufficiently to melt ice and snow that accumulates in the region of the fairing; and
an ejector with a primary nozzle inlet coupled to the outlet of the tracer line for coupling the primary stream of high pressure hot air into an ejector nozzle and a secondary stream inlet that couples the stagnant air region of the inlet muff below the fairing to an ejector mixing tube to suck a secondary stream of air with ice and snow melt from the bottom of the inlet muff and discharge it from an outlet of the ejector mixing tube.
2. The system of claim 1, wherein the tracer line is mounted along a bottom surface of the fairing.
3. The system of claim 1, wherein the tracer line is mounted along a top surface of the fairing.
4. The system of claim 1, wherein the compressor delivery air is provided by an APU load compressor.
5. The system of claim 1, wherein the compressor delivery air is provided by bleed air from a cycle compressor in an APU power head.
6. The system of claim 1, wherein the primary nozzle inlet and the primary nozzle are positioned within the inlet muff.
7. The system of claim 1, further comprising insulation that covers surfaces of the ejector external to the inlet muff.
8. The system of claim 1, wherein the compressor delivery air supplied to the inlet of the tracer line is regulated with valving to suit environmental conditions.
9. The system of claim 1, wherein the compressor delivery air supplied to the inlet of the tracer line is regulated with an orifice to suit environmental conditions.
10. The system of claim 1, wherein the compressor delivery air supplied to the inlet of the tracer line is regulated with a flow restrictor to suit environmental conditions.
11. The system of claim 1, further comprising a manifold with an inlet coupled to the outlet of the ejector mixing tube, a lower outlet for discharging ice and snow melt from the bottom of the inlet muff, and an upper outlet coupled to the stagnant region of the inlet muff for discharging at least a portion of the primary and secondary air streams back into the muff to assist the tracer line to melt any accumulation of ice and snow within the muff that accumulates in the region of the fairing.
12. The system of claim 11, further comprising insulation that covers the manifold.
13. The system of claim 11, wherein the discharge from the upper outlet to the stagnant region of the inlet muff is regulated with valving to suit environmental conditions.
14. The system of claim 11, wherein the discharge from the upper outlet to the stagnant region of the inlet muff is regulated with an orifice to suit environmental conditions.
15. The system of claim 11, wherein the discharge from the upper outlet to the stagnant region of the inlet muff is regulated with a flow restrictor to suit environmental conditions.
16. A system for removing accumulations of ice and snow from the bottom of inlet muff of an auxiliary power unit (APU), comprising:
a gull wing fairing mounted within the inlet muff to direct inlet air into an inlet of the APU that has a plurality of perforations to allow air and liquid flow through the fairing into a stagnant air region of the inlet muff below the fairing;
a tracer line comprising tubing that is arranged along a bottom surface of the fairing in a general \u201czigzag\u201d pattern that has an inlet coupled to a primary stream of high pressure hot air from an APU load compressor and an outlet to warm the fairing sufficiently to melt ice and snow that accumulates in the region of the fairing; and
an ejector with a primary nozzle inlet coupled to the outlet of the tracer line for coupling the primary stream of high pressure hot air into an ejector nozzle, the primary nozzle inlet and the primary nozzle both positioned within the inlet muff, and a secondary stream inlet that couples the stagnant air region of the inlet muff below the fairing to an ejector mixing tube to suck a secondary stream of air with ice and snow melt from the bottom of the inlet muff and discharge it from an outlet of the ejector mixing tube.
17. The system of claim 16, further comprising insulation covering surfaces of the ejector external to the inlet muff.
18. The system of claim 16, wherein the compressor delivery air supplied to the inlet of the tracer line is regulated with valving to suit environmental conditions.
19. The system of claim 16, wherein the compressor delivery air supplied to the inlet of the tracer line is regulated with an orifice to suit environmental conditions.
20. The system of claim 16, wherein the compressor delivery air supplied to the inlet of the tracer line is regulated with a flow restrictor to suit environmental conditions.
21. The system of claim 16, further comprising a manifold with an inlet coupled to the outlet of the ejector mixing tube, a lower outlet for discharging ice and snow melt from the bottom of the inlet muff, and an upper outlet coupled to the stagnant region of the inlet muff for discharging at least a portion of the primary and secondary air streams back into the muff to assist the tracer line to melt any accumulation of ice and snow within the muff that accumulates in the region of the fairing.
22. The system of claim 21, further comprising insulation that covers the manifold.
23. The system of claim 21, wherein the discharge from the upper outlet to the stagnant region of the inlet muff is regulated with valving to suit environmental conditions.
24. The system of claim 21, wherein the discharge from the upper outlet to the stagnant region of the inlet muff is regulated with an orifice to suit environmental conditions.
25. The system of claim 21, wherein the discharge from the upper outlet to the stagnant region of the inlet muff is regulated with a flow restrictor to suit environmental conditions.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A memory cell comprising:
a thyristor device including doped regions of opposite polarity;
a first word line providing read and write access to the memory cell; and
a second word line located adjacent to and separated by an insulative material from at least one of the doped regions of the thyristor device and used for write operation to the memory cell by enhancing the switching of the thyristor device from a high conductance state to a low conductance state and from the low conductance state to the high conductance state.
2. The memory cell of claim 1, further comprising a transistor, wherein the read and write access is provided by the transistor with its gate forming at least part of the first word line.
3. The memory cell of claim 2, wherein the transistor is a MOSFET transistor.
4. The memory cell of claim 1, wherein the second word line enhances the switching of the thyristor device by substantially improving the switching speed of the thyristor device from the high conductance state to the low conductance state.
5. The memory cell of claim 1, wherein the second word line is adapted to enhance the switching of the thyristor device by substantially reducing the voltage requirement of the thyristor device for switching from the low conductance state to the high conductance state.
6. The memory cell of claim 1, wherein at least part of the cell is arranged in a vertical configuration extending above a substrate surface.
7. The memory cell of claim 1, wherein at least part of the cell is arranged in a vertical configuration extending below a substrate surface.
8. The memory cell of claim 1, wherein at least part of the cell is arranged in a planar configuration parallel to a substrate surface.
9. The memory cell of claim 8, wherein the substrate surface is part of a silicon-on-insulator substrate.
10. The memory cell of claim 2, wherein the transistor and the thyristor device are arranged in a planar configuration parallel to a substrate surface.
11. The memory cell of claim 10, wherein the substrate surface is part of a silicon-on-insulator substrate.
12. A memory array comprising:
a first and a second word line; and
a plurality of memory cells, each memory cell comprising a thyristor device including doped regions of opposite polarity, wherein
the first word line providing read and write access to the memory cell; and
a portion of the second word line located adjacent to and separated by an insulative material from at least one of the doped regions of the thyristor device and used for write operation to the memory cell by enhancing the switching of the thyristor device from a high conductance state to a low conductance state and from the low conductance state to the high conductance state.
13. The memory array of claim 12, wherein the memory cell further comprises a transistor, and wherein the read and write access is provided by the transistor with its gate forming at least part of the first word line.
14. The memory array of claim 13, wherein the transistor is a MOSFET transistor.
15. The memory array of claim 12, wherein the second word line enhances the switching of the thyristor device by substantially improving the switching speed of the thyristor device from the high conductance state to the low conductance state.
16. The memory array of claim 12, wherein the second word line enhances the switching of the thyristor device by substantially reducing the voltage requirement of the thyristor device for switching from the low conductance state to the high conductance state.
17. The memory array of claim 12, wherein at least part of the memory cell is arranged in a vertical configuration extending above a substrate surface.
18. The memory array of claim 12, wherein at least part of the memory cell is arranged in a vertical configuration extending below a substrate surface.
19. The memory array of claim 12, wherein at least part of the memory cell is arranged in a planar configuration parallel to a substrate surface.
20. The memory array of claim 19, wherein the substrate surface is part of a silicon-on-insulator substrate.
21. The memory array of claim 13, wherein the transistor and the thyristor device are arranged in a planar configuration parallel to a substrate surface.
22. The memory array of claim 21, wherein the substrate surface is part of a silicon-on-insulator substrate.