Patent ID: 7541463

Claim:
A compound of formula (Ia): wherein R 7 is C 1 -C 6 alkyl, —(C 1 -C 6 alkyl)—NH 2 , —(C 1 -C 6 alkyl)N(C 1 -C 6 alkyl) 2 , or —(C 1 -C 6 alkyl) piperazine; wherein X and Y are independently C or N; wherein R 9 is a phenyl, or a phenyl substituted by 1-3 substituents, wherein the substituents are C 1 -C 6 alkyl, —NO 2 , —OH, C 1 -C 6 alkoxy, or halo, or R 9 taken together with X and Y form a benzene ring; with the proviso that R 9 is absent when X═Y═N; and provided R7 is not a C1-C6 alkyl when R9 taken together with X and Y form a benzene ring or pharmaceutically acceptable salts thereof.