117211-16-2 6H-1,3-Dioxolo(4,5-g)(1)benzopyran-6-ol, 7,8-dihydro-8-(2-hydroxy-3-methoxyphenyl)-7-methyl- 7,8-Dihydro-8-(2-hydroxy-3-methoxyphenyl)-7-methyl-6H-1,3-dioxolo(4,5-g)(1)benzopyran-6-ol