Try searching for...
SCFBio, IIT Delhi
Formula: C20H22O5 | Mol. Weight: 342.40 g/mol
IUPAC: (4aR,11bS)-7,11-dihydroxy-4,4,9,11b-tetramethyl-1,2,4a,5-tetrahydronaphtho[2,1-f][1]benzofuran-3,6-dione
CC1=CC2=C(C3=C(C(=C2O1)O)C4(CCC(=O)C(C4CC3=O)(C)C)C)O