IUPAC:12'-acetyl-10'-hydroxy-7,9'-dimethyl-4'-methylidene-6-(3-oxobut-1-en-1-yl)-2,3a,4,7,8,8a-hexahydro-6',14'-dioxaspiro[cyclohepta[b]furan-3,13'-tricyclo[8.4.0.0^{3,7}]tetradecan]-11'-ene-2,5'-dione
IUPAC:12'-acetyl-10'-hydroxy-7,9'-dimethyl-4'-methylidene-6-(3-oxobut-1-en-1-yl)-2,3a,4,7,8,8a-hexahydro-6',14'-dioxaspiro[cyclohepta[b]furan-3,13'-tricyclo[8.4.0.0^{3,7}]tetradecan]-11'-ene-2,5'-dione