70051-15-9 Benzo(3,4)furo(3',4':6,7)cycloocta(1,2-f)(1,3)benzodioxol-3(1H)-one, 3a,4,14,14a-tetrahydro-4-hydroxy-6,7,8-trimethoxy-, stereoisomer Epipicrosteganol Picrosteganol