1. Antioxidant compositions containing natural or metabolite hydrogenated (1E,6E)-1,7-Bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione derivatives or combinations thereof, the said compositions are devoid of the co-occurring pro-oxidant 1,7-Bis(4-Hydroxyphenyl)-3,5-heptanedione represented by STR#1
2. The compositions according to claim 1, wherein the said derivatives or combinations thereof include:
a) 99.5% pure 1,7-Bis(4-hydroxy-3-methoxyphenyl)-3,5-heptanedione represented by STR#II, not occurring along with 5-Hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-3-heptanone represented by STR#III or 3,5-Dihydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-heptane represented by STR#IV and occurring devoid of pro-oxidant 1,7-Bis(4-hydroxyphenyl)-3,5-heptanedione represented by STR#1;
b) 99.5% pure 1,7-Bis(4-hydroxy-3-methoxyphenyl)-3,5-heptanedione represented by STR#II, not occurring along with 5-Hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-3-heptanone represented by STR#III or 3,5-Dihydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-heptane represented by STR#IV, in combination with 1-(4-hydroxy-3-methoxyphenyl)-7-(4-hydroxyphenyl)-3,5-heptanedione represented by STR#V, and said combination occurring devoid of pro-oxidant 1,7-Bis(4-hydroxyphenyl)-3,5-heptanedione represented by STR#1;
c) 1 -(4-hydroxy-3-methoxyphenyl)-7-(4-hydroxyphenyl)-3,5-heptanedione represented by STR#V, occurring devoid of pro-oxidant 1,7-Bis(4-hydroxyphenyl)-3,5-heptanedione represented by STR#1;
d) 5-Hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-3-heptanone represented by STR#III, occurring devoid of pro-oxidant 1,7-Bis(4-hydroxyphenyl)-3,5-heptanedione represented by STR#1; and
e) 3,5-Dihydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-heptane represented by STR#IV, occurring devoid of pro-oxidant 1,7-Bis(4-hydroxyphenyl)-3,5-heptanedione represented by STR#1.
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 valve comprising an enlarged base and a reinforcement pad mounted on the base, a length of the reinforcement pad being equal to or larger than twice of a width of the reinforcement pad.
2. The valve as claimed in claim 1, wherein the reinforcement pad is made by rubber.
3. A reinforcement structure for a valve of a tire which has a tube having a hole defined through a wall thereof, the valve comprising an enlarged base which is adapted to be connected to the hole, and
a reinforcement pad mounted on the base and adapted to be connected to the tube, a length of the reinforcement pad being equal to or larger than twice of a width of the reinforcement pad.
4. The structure as claimed in claim 3, wherein the reinforcement pad is made by rubber.