116409-21-3 6H-1,3-Dioxolo(4,5-g)(1)benzopyran-6-ol, 7,8-dihydro-6,7-dimethyl-8-(3,4,5-trimethoxyphenyl)- 7,8-Dihydro-6,7-dimethyl-8-(3,4,5-trimethoxyphenyl)-6H-1,3-dioxolo(4,5-g)(1)benzopyran-6-ol