Try searching for...
SCFBio, IIT Delhi
Formula: C20H18O5 | Mol. Weight: 338.40 g/mol
IUPAC: (1S,13R)-7,7-dimethyl-8,12,20-trioxapentacyclo[11.8.0.02,11.04,9.014,19]henicosa-2(11),3,5,9,14(19),15,17-heptaene-1,17-diol
CC1(C=CC2=CC3=C(C=C2O1)OC4C3(COC5=C4C=CC(=C5)O)O)C