2-(Aminomethyl)-5-ethyl-6-hydroxy-3,4-dihydropyrimidin-4-one

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

6-(benzo[d][1,3]dioxol-5-ylmethyl)-5-((2,5-dimethylbenzyl)thio)-1-ethyl-3-methyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one

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

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

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

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

1-(Prop-2-yn-1-yl)-2-(trifluoromethyl)benzene

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

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

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