IUPAC:(1S,4S,8R,9R,13S,16R)-9-ethoxy-11-hydroxy-7,7-dimethyl-17-methylidene-3,10-dioxapentacyclo[14.2.1.0^{1,13}.0^{4,12}.0^{8,12}]nonadecane-2,18-dione
IUPAC:(1S,4S,8R,9R,13S,16R)-9-ethoxy-11-hydroxy-7,7-dimethyl-17-methylidene-3,10-dioxapentacyclo[14.2.1.0^{1,13}.0^{4,12}.0^{8,12}]nonadecane-2,18-dione