Patent ID: 7884094

Claim:
A compound represented by formula (VA): or a pharmaceutically acceptable salt thereof, wherein: one of R i or R j is —H and the other is represented by the following formula: X 1 and X 2 are CH; R 12 , R 13 and R 14 are each, independently, an alkyl, an alkenyl, an alkynyl, cyano, a haloalkyl, an alkoxy, a haloalkoxy, a halo, an amino, an alkylamino, a dialkylamino, —OP(O)(OR 7 ) 2 , —SP(O)(OR 7 ) 2 , nitro, an alkyl ester, or hydroxyl; R 7 for each occurrence, is, independently, —H, an optionally substituted alkyl, an optionally substituted alkenyl, an optionally substituted alkynyl, an optionally substituted cycloalkyl, an optionally substituted cycloalkenyl, an optionally substituted heterocyclyl, an optionally substituted aryl, an optionally substituted heteroaryl, an optionally substituted aralkyl, or an optionally substituted heteraralkyl; R x is phenylalanine; and R y is —H or lower alkyl; R w is an alkoxy;