5-ethoxycarbonylmethyl-7-methyl-2-phenylpyrazolo[1,5-a]pyrimidine

3-溴-2-硝基-苯甲酸乙酯

6-氨基-2-甲基烟酸甲酯

ethyl 6-amino-2-methylpyridine-3-carboxylate

4-ethoxy-5-nitro-1H-imidazole