Patent ID: 8153636

Claim:
A compound of formula (IIa): wherein: x and y are each 1; R 1 is selected from the group consisting of hydrogen or C 1 -C 12 alkyl; R 2 is selected from the group consisting of C 7 -C 12 alkyl, C 3 -C 12 alkenyl, C 3 -C 12 cycloalkyl, C 4 -C 12 cycloalkylalkyl, C 13 -C 19 aralkyl, C 1 -C 12 heteroaryl, C 3 -C 12 heterocyclylalkyl and C 3 -C 12 heteroarylalkyl; R 3 is selected from the group consisting of C 3 -C 12 alkyl, C 3 -C 12 cycloalkyl, C 4 -C 12 cycloalkylalkyl, aryl, C 7 -C 19 aralkyl, C 3 -C 12 heterocyclyl, C 3 -C 12 heterocyclylalkyl, C 1 -C 12 heteroaryl and C 3 -C 12 heteroarylalkyl; R 4 , R 5 and R 6 are each independently selected from hydrogen, bromo, fluoro, chloro, methyl, methoxy, trifluoromethyl, cyano, nitro or —N(R 13 ) 2 ; R 7 , R 7a , R 8 , R 8a , R 9 , R 9a , R 10 and R 10a are each independently selected from hydrogen or C 1 -C 3 alkyl; and each R 13 is independently selected from hydrogen or C 1 -C 6 alkyl; as a stereoisomer, enantiomer or tautomer thereof, or a pharmaceutically acceptable salt thereof.