Try searching for...
SCFBio, IIT Delhi
Formula: C15H8O8 | Mol. Weight: 316.22 g/mol
IUPAC: 6,7,13-trihydroxy-14-methoxy-2,9-dioxatetracyclo[6.6.2.04,16.011,15]hexadeca-1(15),4,6,8(16),11,13-hexaene-3,10-dione
COC1=C(C=C2C3=C1OC(=O)C4=CC(=C(C(=C43)OC2=O)O)O)O