Try searching for...
SCFBio, IIT Delhi
Formula: C14H10O6 | Mol. Weight: 274.22 g/mol
IUPAC: 1,2,3-trihydroxy-5-methoxyxanthen-9-one
COC1=CC=CC2=C1OC3=C(C2=O)C(=C(C(=C3)O)O)O