Try searching for...
SCFBio, IIT Delhi
Formula: C15H20O4 | Mol. Weight: 264.32 g/mol
IUPAC: (3aR,6S,6aR,9aS,9bR)-6a-hydroxy-6,9a-dimethyl-3-methylidene-4,5,6,7,8,9b-hexahydro-3aH-azuleno[8,7-b]furan-2,9-dione
CC1CCC2C(C3(C1(CCC3=O)O)C)OC(=O)C2=C