乙基5-氨基-2-苯基-1,3-恶唑-4-羧酸酯

ethyl 4-amino-2-methyl-1H-imidazole-5-carboxylate

2-苯基-5-氨基噻唑-4-羧酸乙酯

ethyl 2-butyl-4-methylsulfanyl-1H-imidazole-5-carboxylate

4-氨基-1H-咪唑-5-羧酸乙酯