Patent ID: 7166598

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof; wherein Y is C 1 –C 4 alkylene; R 1 is bis [mono (or di or tri) halo (C 1 –C 4 ) alkyl]phenyl; R 2 is phenyl which is substituted with hydroxy and a substituent(s) selected from the group consisting of C 1 –C 4 alkyl, mono (or di or tri) halo(C 1 –C 4 ) alkyl, halogen, C 1 –C 4 alkoxy and hydroxy; R 3 hydrogen; and R 4 is (2,6-dimethylmorpholino) (C 1 –C 4 ) alkyl; (2-methoxymethylmorpholino) (C 1 –C 4 )alkyl; (3-methoxymethylmorpholino) (C 1 –C 4 ) alkyl; or (2-methoxymethyl-5-methylmorpholino) (C 1 –C 4 ) alkyl.