Patent ID: 7378534

Claim:
A purified compound selected from the group consisting of the following compounds of Formulae I-IV: wherein R is, independently, H or an optionally substituted C 1 -C 15 alkyl group, L is an optionally substituted C 1 -C 15 linear or branched, saturated, monounsaturated or polyunsaturated alkyl group optionally interrupted by one or plural nonadjacent sulfur or oxygen atoms and optionally terminated at one or both ends by oxygen, Har is an optionally substituted C 6 -C 24 aromatic group or heteroaromatic group optionally containing one or plural ring atoms selected from the group consisting of N, O, S, and P, and E is —OH, —COOH, —COOR where R is defined above or an optionally substituted C 1 -C 8 linear or branched, saturated, monounsaturated or polyunsaturated alkyl group optionally interrupted by one or plural nonadjacent oxygen or sulfur atoms, or E is a C 3 -C 8 optionally substituted cyclic saturated, monounsaturated or polyunsaturated alkyl group optionally interrupted by one or plural nonadjacent oxygen or sulfur atoms, or E is optionally substituted HAr.