5-Amino-1,5-dihydro-1-methyl-4H-pyrazolo<3,4-d>pyrimidin-4-one

5 -[(ethoxymethylene)amino]-1-methyl-1H- pyrazole-4-carboxylic acid, ethyl ester

5-氨基-1-甲基吡唑-4-甲酰胺

甲酸乙酯

1-甲基-4-氨基-1H-吡唑并[3,4-D]嘧啶