7-bromo-3-hydroxy-4H-benzo[1,4]thiazine-2-carboxylic acid ethyl ester

3-[(3-乙氧基-3-氧代丙酰基)氨基]-3-甲基丁酸乙酯

ethyl 3-(2-nitroanilino)-3-oxopropanoate

ethyl 3-(dimethylamino)-3-oxopropanoate

ethyl 3-anilino-3-oxo-2-phenyliminopropanoate