3-benzo[1,3]dioxol-5-yl-7-hydroxy-4-oxo-4H-chromene-2-carboxylic acid ethyl ester

3,4-亚甲二氧苯乙酮

1-(1,3-苯并氧)2-溴乙酮

原甲酸三乙酯

盐酸