Try searching for...
SCFBio, IIT Delhi
Formula: C18H16O7 | Mol. Weight: 344.30 g/mol
IUPAC: (6aS,12aR)-11,12a-dihydroxy-9,10-dimethoxy-6,6a-dihydrochromeno[3,4-b]chromen-12-one
COC1=C(C(=C2C(=C1)OC3COC4=CC=CC=C4C3(C2=O)O)O)OC