methyl 6,7-dimethoxy-4-oxochromane-5-carboxylate

5-bromo-6,7-dimethoxyspiro[chromane-4,2'-[1,3]dioxolane]

3-iodo-6,7-dimethoxy-4-oxo-4H-chromene-5-carboxylic acid methyl ester

5-溴香兰素

香草醛