2-Butenoicacid, 2-methyl-,5,6,7,8-tetrahydro-1,2-dimethoxy-6,7-dimethyl-3-oxo-3H,14H-benzo[1,8]cycloocta[1,2,3-cd][1,3]dioxolo[4,5-g]benzofuran-8-ylester, [6a,7a,8a(Z),14aS*]-(-)-

2-Butenoicacid, 2-methyl-,5,6,7,8-tetrahydro-1,2-dimethoxy-6,7-dimethyl-3-oxo-3H,14H-benzo[1,8]cycloocta[1,2,3-cd][1,3]dioxolo[4,5-g]benzofuran-8-ylester, [6a,7a,8a(Z),14aS*]-(-)- ·