Patent ID: 7179934

Claim:
A compound or salts thereof, the compound selected from the following compounds and stereoisomers thereof: wherein R 3 is a hydrogen atom, (C 1 –C 6 )alkyl, (C 3 –C 6 )cycloalkyl, (C 3 –C 6 )cycloalkyl-(C 1 –C 3 )alkyl, phenyl, or phenyl-(C 1 –C 3 )alkyl, wherein the alkyl and cycloalkyl moieties or substituents are optionally substituted with from one to five fluorine atoms, and the phenyl substituent or the phenyl moiety of the phenyl-(C 1 –C 3 )alkyl substituent is optionally substituted with from one to five substituents independently selected from chloro, fluoro, amino, nitro, cyano, hydroxy, (C 1 –C 3 )alkylamino, (C 1 –C 3 )alkyl optionally substituted with from one to three fluorine atoms, and (C 1 –C 3 )alkoxy optionally substituted with from one to three fluorine atoms; and R 13 and R 15 are each independently (C 1 –C 6 )alkyl, (C 3 –C 6 )cycloalkyl, or (C 3 –C 6 )cycloalkyl-(C 1 –C 3 )alkyl in Formulas 39 and 41, when R 3 is H or C 2 alkyl, R 15 is not C 1 alkyl, and R 13 is not C 2 alkyl.