IUPAC:5-ethenyl-15-hydroxy-3,17-dimethoxy-9-oxatetracyclo[8.8.0.0^{2,7}.0^{11,16}]octadeca-1(10),2(7),3,5,11(16),12,14,17-octaen-8-one
IUPAC:5-ethenyl-15-hydroxy-3,17-dimethoxy-9-oxatetracyclo[8.8.0.0^{2,7}.0^{11,16}]octadeca-1(10),2(7),3,5,11(16),12,14,17-octaen-8-one