117211-89-9 6H-1,3-Dioxolo(4,5-g)(1)benzopyran, 7,8-dihydro-6-methyl-6-propoxy-8-(3,4,5-trimethoxyphenyl)- 7,8-Dihydro-6-methyl-6-propoxy-8-(3,4,5-trimethoxyphenyl)-6H-1,3-dioxolo(4,5-g)(1)benzopyran