14-(Acetyloxy)-3a,4,14,14a-tetrahydro-6,7,8-trimethoxybenzo(3,4)furo(3',4':6,7)cycloocta(1,2-f)(1,3)benzodioxol-3(1H)-one stereoisomer 69609-67-2 Benzo(3,4)furo(3',4':6,7)cycloocta(1,2-f)(1,3)benzodioxol-3(1H)-one, 14-(acetyloxy)-3a,4,14,14a-tetrahydro-6,7,8-trimethoxy-, stereoisomer