117211-99-1 6H-1,3-Dioxolo(4,5-g)(1)benzopyran-6-ol, 7,8-dihydro-8-(4-hydroxy-3,5-dimethoxyphenyl)-6-methyl- 7,8-Dihydro-8-(4-hydroxy-3,5-dimethoxyphenyl)-6-methyl-6H-1,3-dioxolo(4,5-g)(1)benzopyran-6-ol