label: (7S,8R,7'R,8'R)-7-(3,4-methylenedioxyphenyl)-8,8'-dimethyl-8'-hydroxyl-7'-methoxyl-7'-(3',4'-methylenedioxyphenyl)tetrahydrofuran
label_lc: (7s,8r,7'r,8'r)-7-(3,4-methylenedioxyphenyl)-8,8'-dimethyl-8'-hydroxyl-7'-methoxyl-7'-(3',4'-methylenedioxyphenyl)tetrahydrofuran