IUPAC:(1S,1'S,2'Z,7'R,8'R)-2'-butylidene-8'-propyl-6,7-dihydro-3H-3'-oxaspiro[2-benzofuran-1,9'-tricyclo[5.2.2.0^{1,5}]undecan]-5'-ene-3,4'-dione
IUPAC:(1S,1'S,2'Z,7'R,8'R)-2'-butylidene-8'-propyl-6,7-dihydro-3H-3'-oxaspiro[2-benzofuran-1,9'-tricyclo[5.2.2.0^{1,5}]undecan]-5'-ene-3,4'-dione