Methyl (2E)-4-(2,4-Dimethoxyphenyl)-4-oxobut-2-enoate

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

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

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

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

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

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

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

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

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

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