IUPAC:(1R,2R,5R,8S,9R,10R,13R,17S)-2,9-dihydroxy-1,13-dimethyl-6-methylidene-11-oxapentacyclo[8.6.1.1^{5,8}.0^{2,8}.0^{13,17}]octadecane-7,12-dione
IUPAC:(1R,2R,5R,8S,9R,10R,13R,17S)-2,9-dihydroxy-1,13-dimethyl-6-methylidene-11-oxapentacyclo[8.6.1.1^{5,8}.0^{2,8}.0^{13,17}]octadecane-7,12-dione