116409-03-1 8H-1,3-Dioxolo(4,5-h)(1)benzopyran-7-carboxylic acid, 6-methyl-8-(3,4,5-trimethoxyphenyl)-, ethyl ester Ethyl 6-methyl-8-(3,4,5-trimethoxyphenyl)-8H-1,3-dioxolo(4,5-h)(1)benzopyran-7-carboxylate