3-甲基-4-氧-4,5,6,7-四氢-1氢-吲哚-2-甲酸乙酯

ethyl 4,5,6,7-tetrahydro-1H-indole-2-carboxylate

diethyl 2-(propanoylamino)propanedioate

diethyl 2-acetyloxyiminopropanedioate

diethyl 1-acetyloxyaziridine-2,2-dicarboxylate