IUPAC:(1S,2'S,4'S,5'R,9'Z)-9'-butylidene-4'-propyl-6,7-dihydro-3H-10'-oxaspiro[2-benzofuran-1,3'-tricyclo[6.3.0.0^{2,5}]undecan]-1'(8')-ene-3,11'-dione
IUPAC:(1S,2'S,4'S,5'R,9'Z)-9'-butylidene-4'-propyl-6,7-dihydro-3H-10'-oxaspiro[2-benzofuran-1,3'-tricyclo[6.3.0.0^{2,5}]undecan]-1'(8')-ene-3,11'-dione