Try searching for...
SCFBio, IIT Delhi
Formula: C18H22O5 | Mol. Weight: 318.40 g/mol
IUPAC: (1S,2R,6R,9R,10S,11R,12R,15R)-11-hydroxy-2,6,9,15-tetramethyl-13-oxatetracyclo[10.2.1.02,10.05,9]pentadec-4-ene-3,8,14-trione
CC1CC(=O)C2(C1=CC(=O)C3(C2C(C4C(C3C(=O)O4)C)O)C)C