ethyl 5-(2-ethyl-4-oxoquinazolin-3-yl)-1-methylpyrazole-4-carboxylate

ethyl 1-methyl-5-(4-oxoquinazolin-3-yl)pyrazole-4-carboxylate

1-甲基-5-氨基吡唑-4-甲酸

1-methyl-5-pyrrol-1-ylpyrazole-4-carboxylic acid

5-氨基-1-甲基-4-吡唑甲酰肼