IUPAC: [4-({[(2R,3R)-5,7-dihydroxy-2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-1-benzopyran-3-yl]oxy}carbonyl)-2,6-dihydroxyphenyl]oxidanesulfonic acid

SMILES: Oc1cc(O)c2C[C@@H](OC(=O)c3cc(O)c(OS(O)(=O)=O)c(O)c3)[C@H](Oc2c1)c1cc(O)c(O)c(O)c1