ethyl 2-[(3-cyano-4,5-dimethylthiophen-2-yl)amino]-2-oxoacetate

ethyl 2-oxo-2-(2-sulfamoylanilino)acetate

ethyl 2-[2,6-di(propan-2-yl)anilino]-2-oxoacetate

4-苯氧基苯甲酰基甲酸乙酯

Methyl D-prolinate hydrochloride (1:1)