Synonyms: ( )-Interiotherin B;181701-07-5;2-Butenoic acid, 2-methyl-, (5S,6S,7S,13aS)-5,6,7,8-tetrahydro-6-hydroxy-13,14-dimethoxy-6,7-dimethylcycloocta(1,2-f:3,4-f')bis(1,3)benzodioxol-5-yl ester, (2Z)-;2-Butenoic acid, 2-methyl-, 5,6,7,8-tetrahydro-6-hydroxy-13,14-dimethoxy-6,7-dimethylcycloocta(1,2-f:3,4-f')bis(1,3)benzodioxol-5-yl ester, stereoisomer