(2S,4S)-1-(tert-Butoxycarbonyl)-4-(4-fluoro-3-methylphenoxy)-2-pyrrolidinecarboxylic acid

N-[(4-chlorophenyl)methyl]-2-{[1-ethyl-3-methyl-7-oxo-6-(2-phenylethyl)-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-5-yl]sulfanyl}acetamide

N-(4-acetylphenyl)-2-((1-ethyl-3-methyl-7-oxo-6-phenethyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)thio)acetamide

N-(2,3-dimethylphenyl)-2-{[1-ethyl-3-methyl-7-oxo-6-(2-phenylethyl)-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-5-yl]sulfanyl}acetamide

5-((2-chlorobenzyl)thio)-1-ethyl-3-methyl-6-phenethyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one

1-ethyl-5-((2-fluorobenzyl)thio)-3-methyl-6-phenethyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one

5-((2-chloro-6-fluorobenzyl)thio)-1-ethyl-3-methyl-6-phenethyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one

1-ethyl-5-((3-methoxybenzyl)thio)-3-methyl-6-phenethyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one

N-benzyl-2-({1-ethyl-3-methyl-6-[(4-methylphenyl)methyl]-7-oxo-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-5-yl}sulfanyl)acetamide

N-cyclohexyl-2-({1-ethyl-3-methyl-6-[(4-methylphenyl)methyl]-7-oxo-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-5-yl}sulfanyl)acetamide

2-({1-ethyl-3-methyl-6-[(4-methylphenyl)methyl]-7-oxo-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-5-yl}sulfanyl)-N-(2-phenylethyl)acetamide