Try searching for...
SCFBio, IIT Delhi
Formula: C20H22O5 | Mol. Weight: 342.40 g/mol
IUPAC: (2S,9S,11bS)-2,7,11-trihydroxy-3,4,9,11b-tetramethyl-1,2,8,9-tetrahydronaphtho[2,1-f][1]benzofuran-6-one
CC1CC2=C(C3=C(C(=C2O1)O)C4(CC(C(=C(C4=CC3=O)C)C)O)C)O