Patent ID: 6992086

Claim:
A compound of formula A or formula B: where R 1 , R 2 , and R 3 are independently, hydrogen, or optionally substituted lower alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkyl(lower alkyl), optionally substituted heterocycloalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted aryl(lower alkyl), halo(lower alkyl), —CF 3 , halogen, nitro, —CN, —OR 9 , —SR 9 , —NR 9 R 10 , —NR 9 (carboxy(lower alkyl)), —C(═O)R 9 , —C(═O)OR 9 , —C(═O)NR 9 R 10 , —OC(═O)R 9 , —SO 2 R 9 , —OSO 2 R 9 , —SO 2 NR 9 R 10 , —NR 9 SO 2 R 10 or —NR 9 C(═O)R 10 , where R 9 and R 10 are independently, hydrogen, optionally substituted lower alkyl, lower alkyl-N(C 1-2 alkyl) 2 , lower alkyl(optionally substituted heterocycloalkyl), alkenyl, alkynyl, optionally substituted cycloalkyl, cycloalkyl(lower alkyl), optionally substituted heterocycloalkyl(lower alkyl), aryl(lower alkyl), optionally substituted aryl, optionally substituted aryloxy, heteroaryl, heteroaryl(lower alkyl), or R 9 and R 10 together are —(CH 2 ) 4-6 — optionally interrupted by one O, S, NH, N-(aryl), N-(aryl(lower alkyl)), N-(carboxy(lower alkyl)) or N-(optionally substituted C 1-2 alkyl) group, R 4 and R 5 are independently, hydrogen or lower alkyl, R 6 is hydrogen, optionally substituted lower alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkyl(lower alkyl), optionally substituted heterocycloalkyl, optionally substituted aryl, optionally substituted aryl(lower alkyl), optionally substituted heteroaryl, optionally substituted heteroaryl(lower alkyl), —C(═O)R 11 , —C(═O)OR 11 , —C(═O)NR 11 R 12 , —SO 2 R 11 , or —SO 2 NR 11 R 12 , where R 11 and R 12 are independently, hydrogen, optionally substituted lower alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkyl(lower alkyl), aryl, optionally substituted aryloxy, heteroaryl, heteroaryl(lower alkyl), or R 11 and R 12 together are —(CH 2 ) 4-6 —, or a pharmaceutically acceptable salt thereof, optionally in the form of a single stereoisomer or mixture of stereoisomers thereof.