Try searching for...
SCFBio, IIT Delhi
Formula: C20H26O4 | Mol. Weight: 330.40 g/mol
IUPAC: (3S,4aS,10aR,11aR,11bS)-3-hydroxy-4,4,8,11b-tetramethyl-1,3,4a,5,6,10a,11,11a-octahydronaphtho[2,1-f][1]benzofuran-2,9-dione
CC1=C2C=C3CCC4C(C(C(=O)CC4(C3CC2OC1=O)C)O)(C)C