Ethyl 5-methyl-1-(4-methylphenyl)-1H-pyrazole-3-carboxylate

2-氨基-6-甲基-4-嘧啶羧酸甲酯

5-甲基-2-p-甲苯基-2h-吡唑-3-羧酸

3-acetyl-1-oxido-4-oxoquinoxalin-4-ium-2-carboxylic acid

乙基3-氨基-5-氰基-2-甲基异烟酸酯