Patent ID: 7183445

Claim:
A compound of formula (II) wherein X is selected from the group consisting C(O) and CH 2 ; R 4 is selected from the group consisting of hydrogen and lower alkyl; R 5 is selected from the group consisting of alkyl; R 6 is selected from the group consisting of -(aralkyl)-Q-(alkyl)-NR A R b ; Q is selected from the group consisting of O and S; R A and R B are each independently selected from the group consisting of hydrogen and alkyl; alternatively R A and R B are taken together with the N atom to which they are bound to form a heteroaryl or heterocycloalkyl group; {circle around (C)} is selected from the group consisting of phenyl optionally substituted with one or more substitutents independently selected from halogen, hydroxy, alkoxy, aralkyloxy or NR A R B -alkoxy; or a pharmaceutically acceptable salt thereof.