Patent ID: 8404863

Claim:
A compound having a formula: wherein m and n are independently 0, 1, or 2; W and X are independently O, C═O, C(R 2 ) 2 , S, S(O), SO 2 , N—R 2 , or C═NR 2 , wherein R 2 is independently H, OH, C 1-6 alkyl, —O—(C 1-6 alkyl), or —NH—(C 1-6 alkyl); Y is CH 2 , C═O, —NHC(O)—, or heteroaryl having a formula C 1-6 H 0-11 N 0-3 O 0-2 S 0-2 F 0-1 Cl 0-1 Br 0-1 ; Z is CH 2 , CHOH, C═O, —C(O)NH—, —NHC(O)—, or heteroaryl having a formula C 1-6 H 0-11 N 0-3 O 0-2 S 0-2 F 0-1 Cl 0-1 Br 0-1 ; A and B are independently aryl or heteroaryl having a formula C 1-12 H 0-29 N 0-4 O 0-6 S 0-4 F 0-6 Cl 0-4 Br 0-4 I 0-4 ; and R is C 1-6 hydrocarbyl.