IUPAC: 5-(furan-3-yl)-4'-methylidene-10'-oxaspiro[oxolane-3,5'-tricyclo[7.2.1.0^{1,6}]dodecane]-2,11'-dione

SMILES: C=C1CCC23CC(CCC2C11CC(OC1=O)c1ccoc1)OC3=O