Patent ID: 7902252

Claim:
A compound having a structure according to Formula (Vc): wherein R 1a is a member selected from H, alkyl, and where n is an integer from 0 to 3, R 5a , R 5b and R 5c are members independently selected from H, C 1 to C 4 alkyl, C 1 to C 4 alkyne, nitrile, Br, Cl, F, OR 18a , furan, tetrahydrofuran, and pyrrole, R 18a is a member selected from H and C 1 to C 4 alkyl, R 6 is a member selected from OH and O − X + , wherein X + is a cation, and any enantiomer, diastereoisomer, racemic mixture, enantiomerically enriched mixture, and enantiomerically pure form thereof.