Patent ID: 7407954

Claim:
A compound of formula (Ia) or a pharmaceutically acceptable salt or ester thereof; wherein A is a thiophenyl moiety that is optionally substituted with one or more of alkyl, aryl, halo, alkoxy, haloalkyl, aryloxy, amino, heteroaryl, or arylalkyl; Y is O, S or NR 2 , wherein R 2 is hydrogen or an alkyl group having 1 to 6 carbon atoms; and R 1 is an unbranched alkyl group having from 6 to 25 carbon atoms, a branched alkyl group having from 6 to 25 carbon atoms, an arylalkyl group wherein the alkyl moiety has from 4 to 12 carbon atoms; or a phenyl group substituted with one or more optionally substituted phenyloxy, phenylthio, SO-phenyl, SO 2 -phenyl, alkylphenyl, CO-phenyl, CO 2 -phenyl, CONR 16 -phenyl, NR 16 CO-phenyl or NR 16 -phenyl groups, wherein R 16 is hydrogen or an alkyl group having from 1 to 4 carbon atoms, and wherein the phenyloxy, phenylthio, SO-phenyl, SO 2 -phenyl, alkylphenyl, CO-phenyl, CO 2 -phenyl, CONR 16 -phenyl, NR 16 CO-phenyl or NR 16 -phenyl groups are optionally substituted with one or more of halo, cyano, nitro, alkyl, alkylhalo, alkoxy, aryl, alkylaryl, aryloxy, amino, hydroxy or heteroaryl; or a phenyl group substituted with one or more of halo, NR 6 R 7 , OR 6 , SR 6 , COR 6 , CO 2 R 6 , nitro, cyano, aryl, hetereoaryl, alkyl aryl, alkyl, haloalkyl or alkoxy with the proviso that said compound is not 5-methyl-2-(4-methoxyphenyl)amino-4H-thieno[2,3-d][1,3]oxazin-4-one, 6-pentyl-2-(4-chlorophenyl)amino-4H-thieno[2,3-d][1,3]oxazin-4-one or 6-pentyl-2-(4-methoxyphenyl)amino-4H-thieno[2,3-d][1,3]oxazin-4-one.