SMILES: C1=C(C(=CC(=C1C(=O)O)C(=O)O)C(=O)O)C(=O)O
Description: The molecule is a tetracarboxylic acid that is benzene substituted by four carboxy groups at positions 1, 2, 4 and 5 respectively. It is a member of benzoic acids and a tetracarboxylic acid.