IUPAC:(2S,5R,8R,10R,11S,14S,17S,18R,20R)-2,20-dihydroxy-5-methyl-13-methylidene-7,9-dioxahexacyclo[8.7.2.1^{11,14}.0^{1,8}.0^{5,18}.0^{11,17}]icosan-12-one
IUPAC:(2S,5R,8R,10R,11S,14S,17S,18R,20R)-2,20-dihydroxy-5-methyl-13-methylidene-7,9-dioxahexacyclo[8.7.2.1^{11,14}.0^{1,8}.0^{5,18}.0^{11,17}]icosan-12-one