SMILES: C1=C(NC(=O)C(=C1[O-])/C=C/C(=O)C(=O)O)C(=O)[O-]
Description: The molecule is dicarboxylate anion of 5-(3-carboxy-3-oxopropenyl)-4,6-dihydroxypyridine-2-carboxylic acid; major species at pH 7.3. It is a conjugate base of a 5-(3-carboxy-3-oxopropenyl)-4,6-dihydroxypyridine-2-carboxylic acid.