Patent ID: 7101902

Claim:
A compound having the structural formula A or B wherein R 1 and R 2 are each independently a hydrogen, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkoxyl, amino, substituted or unsubstituted alkylamino or substituted or unsubstituted alkylaryl, and wherein R 3 is a substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted acyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkylaryl, sulfonyl, or substituted or unsubstituted alkylsulfonyl, or a pharmaceutically acceptable salt thereof.