Formula: C28H20O14 | Mol. Weight: 580.40 g/mol
IUPAC: 1-[5,7-dihydroxy-3-(3,4,5-trihydroxybenzoyl)oxy-3,4-dihydro-2H-chromen-2-yl]-3,4,6-trihydroxy-5-oxobenzo[7]annulene-8-carboxylic acid
C1C(C(OC2=CC(=CC(=C21)O)O)C3=CC(=C(C4=C3C=C(C=C(C4=O)O)C(=O)O)O)O)OC(=O)C5=CC(=C(C(=C5)O)O)O