diethyl 3-ethyl-1H-pyrrole-2,4-dicarboxylate

1-氨基-3-甲基-1H-吡咯-2,4-二羧酸二乙酯

potassium,2-isocyanoacetate

ethyl 5-propyl-1,3-thiazole-4-carboxylate

ethyl 5-phenyl-1,3-thiazole-4-carboxylate