SMILES: C1=CC(=CC=C1C(=O)O)S(=O)(=O)O
Description: The molecule is a sulfobenzoic acid in which the sulfonic acid and carboxylic acid groups are in a para-relationship. It derives from a benzoic acid. It is a conjugate acid of a 4-sulfobenzoate(1-) and a 4-sulfonatobenzoate(2-).