Try searching for...
SCFBio, IIT Delhi
Formula: C18H16O7 | Mol. Weight: 344.30 g/mol
IUPAC: (6aR,12aR)-9,12a-dihydroxy-2,3-dimethoxy-6,6a-dihydrochromeno[3,4-b]chromen-12-one
COC1=C(C=C2C(=C1)C3(C(CO2)OC4=C(C3=O)C=CC(=C4)O)O)OC