SMILES: C1=CC(=CC(=C1)C(=O)O)C(=O)O
Description: The molecule is a benzenedicarboxylic acid that is benzene substituted by carboxy groups at position 1 and 3. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and terephthalic acids. It is a conjugate acid of an isophthalate(1-).