Formula: C21H18O15S | Mol. Weight: 542.40 g/mol
IUPAC: (2S,3R,4S,5R,6S)-6-[5,7-dihydroxy-2-(4-hydroxyphenyl)-4-oxochromen-8-yl]oxy-3,5-dihydroxy-4-sulfooxyoxane-2-carboxylic acid
C1=CC(=CC=C1C2=CC(=O)C3=C(O2)C(=C(C=C3O)O)OC4C(C(C(C(O4)C(=O)O)O)OS(=O)(=O)O)O)O