ethyl 7-N-(carbethoxy)aminocoumarin-4-acetate

2-[7-(ethoxycarbonylamino)-2-oxochromen-4-yl]acetic acid

methyl 7-ethoxycarbonylaminocoumarin-4-acetate

(3-羟基-苯基)-氨基甲酸乙酯

3-氨基苯酚