Patent ID: 6939870

Claim:
A compound represented by the formula I: wherein A represents the following heterocycles: n is 2 to 4; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are each independently hydrogen, straight chain alkyl of 1 to 4 carbon atoms, branched chain alkyl of 3 to 6 carbon atoms, cycloalkyl of 3 to 10 carbon atoms, halogen, alkoxy group of 1 to 4 carbon atoms, heteroaryloxy, cycloalkoxy having 3 to 6 ring members, heterocycloalkoxy of 3 to 6 ring members selected from C, O, S and N where N may have a substituent R 9 , hydroxy, nitro, nitrile, amino, carboxy, alkoxycarbonyl of 1 to 4 carbon atoms, alkylcarbonyl of 1 to 4 carbon atoms, aminocarbonyl and alkylaminocarbonyl of 1 to 12 carbon atoms, straight or branched chain fluorinated alkyl of 1 to 4 carbon atoms, aryl, aryloxy, alkylaryl of 7 to 12 carbon atoms, heteroaryl, heterocycloalkyl having ring atoms selected from atom C, S, O and N where N may have a substituent R 9 ; R 9 is C 1 -C 6 alkyl optionally substituted with R 10 , C 3 -C 6 alkenyl or alkynyl with the proviso that a carbon bearing a double or triple bond is not bonded directly to a ring heteroatom, C 6 -C 10 aryl optionally substituted with R 10 , C 7 -C 12 alkylaryl optionally substituted with R 10 , heteroaryl optionally substituted with R 10 , alkylheteroaryl optionally substituted with R 10 , SO 2 -aryl, or SO 2 -alkyl; R 10 is halogen, nitrile, alkoxy, aryloxy, aryl, heteroaryl, cycloalkyl, or heterocycloalkyl with a hetero atom selected from N, O and S, and each crystalline form and pharmaceutically acceptable salt thereof.