Patent ID: 7709599

Claim:
A compound of the formula: wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , and R 11 are the same or different and selected from the group consisting of: (a) hydrogen, (b) alkyl, (c) alkenyl, (d) alkynyl, (e) alkoxy, (f) thioalkyl, (g) NH 2 , (h) alkyl-amine, (i) alkenyl-amine, (j) amide, (k) hydroxyl, (l) alkyl-OH (m) alkenyl-OH (n) COOH, (o) alkyl-COOH, and (p) alkenyl-(COOH) wherein n is an integer ranging from 1 to 180.