Patent ID: 7893071

Claim:
A compound represented by a general structure selected from the group consisting of structure I and structure II: wherein R 1 is selected from the group consisting of H, C 1 -C 4 alkyl, and C 1 -C 8 alkoxy; R 3 is R 8 is H; R 4 is selected from the group consisting of H, C 1 -C 8 alkyl, phenyl and benzyl; R 10 and R 11 are independently selected from the group consisting of H, bromo, ortho-Cl, meta-Cl, fluoro, iodo, C 2 -C 8 alkyl, C 1 -C 8 haloalkyl, hydroxy and C 2 -C 8 alkoxy or R 10 and R 11 taken together, can form with the adjacent ring, C 5 -C 6 cycloalkyl or C 5 -C 6 aromatic ring, wherein when either of R 10 or R 11 are hydrogen, the other is not hydrogen, alkyl, or amino; provided that when R 3 is neither R 10 or R 11 is a trifluoromethyl, hydroxy, bromo, chloro, fluoro, iodo, NH 2 , or C 2 -C 8 alkyl group, or C 2 -C 3 alkoxy group ortho to the point of attachment of R 3 to structure I or structure II, nor are R 10 and R 11 both hydrogen; R 5 and R 7 are independently H, or C 1 -C 8 alkyl; R 6 is selected from the group consisting of H, or C 1 -C 12 alkyl, C 2 -C 8 alkenyl and C 2 -C 8 alkynyl;