5-甲基-8-硝基-6-氧代-5,6-二氢-4H-苯并[f]咪唑并[1,5-a][1,4]二氮杂卓-3-羧酸乙酯

ethyl 2-isocyanato-2-(1-methylpyrrolidin-2-ylidene)acetate

3,4-二甲基-1H-吡咯-2-羧酸乙酯

Ethyl 5-(4-aminophenyl)-1,3-oxazole-4-carboxylate

3,4-二乙基-1H-吡咯-2-羧酸乙酯