Patent ID: 7671054

Claim:
A compound having a structure of Formula (IA): as an isolated stereoisomer or a mixture of stereoisomers or as a pharmaceutically acceptable salt thereof, wherein: A is —(C═O)—; B is —(CHR 4 )—; D is —(C═O)—; E is —ZR 6 —, wherein Z is CH; G is —XR 7 —, wherein X is N; W is —(C═O)NH—, —(C═O)O—, —(C═O)S—, —S(O) 2 — or nothing; and each of R 1 , R 2 , R 4 , R 6 and R 7 is the same or different and independently (a) an amino acid side chain moiety, or (b) an amino acid side chain derivative selected from alkyl, acyl, alkoxy, aryl, arylalkyl, heterocyclyl, and heterocyclylalkyl.