SMILES: C1=CC(=C(C=C1S(=O)(=O)O)O)O
Description: The molecule is a benzene ring substituted with a sulphonic acid group at position C-1, and hydroxy groups at C-3 and C-4. It has a role as a metabolite. It is a conjugate acid of a 3,4-dihydroxybenzenesulfonate.