Patent ID: 7052743

Claim:
A chiral compound represented by the following structure: wherein A, B, C and D are the same and are selected from the group consisting of methylene, carbonyl, mono-substituted nitrogen (N—R), and di-substituted carbon (R 1 —C—R 2 ), wherein R, R 1 and R 2 are independently hydrogen or a substituent and any two R, R 1 and R 2 groups on the same ring in said structure can optionally form a fused ring, the X groups are independently selected substituents, the n subscripts are independently 0, 1, 2, or 3, and the R CO groups are independently aryl, alkyl, cycloalkyl, alkaryl or heterocyclic, all either substituted or unsubstituted, and wherein any two X and/or R CO groups can optionally form a fused ring and the two R CO groups can optionally connect to form a bridge.