Try searching for...
SCFBio, IIT Delhi
Formula: C20H24O5 | Mol. Weight: 344.40 g/mol
IUPAC: (1aR,3aS,4R,5R,5'R,7aS,7bS)-5'-(furan-3-yl)-5,7a,7b-trimethylspiro[1a,2,3,3a,5,6-hexahydronaphtho[1,2-b]oxirene-4,3'-oxolane]-2',7-dione
CC1CC(=O)C2(C(C13CC(OC3=O)C4=COC=C4)CCC5C2(O5)C)C