116385-33-2 5H-1,3-Dioxolo(4,5-g)(1)benzopyran, 8-(2,4-dimethoxyphenyl)-7,8-dihydro-6-methoxy-6,7-dimethyl- 8-(2,4-Dimethoxyphenyl)-7,8-dihydro-6-methoxy-6,7-dimethyl-5H-1,3-dioxolo(4,5-g)(1)benzopyran