间苯二酚

7-bromo-2-oxo-2H-chromene-3-carboxylic acid ethyl ester

4-溴-2-羟基苯甲醛

ethyl 7-((4-methoxybenzyl)oxy)-2-oxo-2H-chromene-3-carboxylate

ethyl 2-oxo-7-((4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)oxy)-2H-chromene-3-carboxylate