Patent ID: 7960569

Claim:
A compound of Formula (IIb): or pharmaceutically acceptable salts thereof, wherein: A is selected from the group consisting of phenyl, 2-F-phenyl, 4-F-phenyl, 4-l-phenyl, 4-methyl-phenyl, 4-ethyl-phenyl, 4-isopropylphenyl, 4-n-butylphenyl, 4-sec-butylphenyl, 4-tert-butylphenyl, 4-CF 3 -phenyl, 4-methoxyphenyl, 4-ethoxy-phenyl, 4-n-butoxyphenyl, 4-n-heptoxyphenyl, 4-methylthiophenyl, 4-acetylphenyl, 4-difluoromethoxy-phenyl, 4-trifluoromethoxy-phenyl, 4-trifluoromethylthio-phenyl, 4-NMe 2 -phenyl, 4-NO 2 -phenyl, 4-cyanomethylphenyl, 2-methylcarbonyl-phenyl, 4-CO 2 Et-phenyl, 4-(1-(diethylamino)-2-methylpropan-2-yl)-phenyl, 2,4-difluorophenyl, 2,5-difluorophenyl, 4-Cl-2-F-phenyl, 4-l-2-F-phenyl, biphenyl-4-yl, 4-benzylphenyl, 4-phenoxyphenyl, 4-phenylcarbonylphenyl, and R 6 is selected from the group consisting of phenyl, 2-ethyl-phenyl, 2-isopropylphenyl, 2-vinyl-phenyl, 2-trifluoromethyl-phenyl, 2-(methoxymethyl)-phenyl, 2-(t-butoxymethyl)-phenyl, 2-formyl-phenyl, 2-acetylphenyl, 4-NMe 2 -phenyl, and biphenyl-2-yl; and R 7 is H; provided that: when A is phenyl, then R 6 is other than phenyl.