Try searching for...
SCFBio, IIT Delhi
Formula: C15H18O3 | Mol. Weight: 246.30 g/mol
IUPAC: (4aS,5R,8aS,9aS)-3,5,8a-trimethyl-4a,5,9,9a-tetrahydro-4H-benzo[f][1]benzofuran-2,6-dione
CC1C2CC3=C(C(=O)OC3CC2(C=CC1=O)C)C