SMILES: C1=C(NC(=O)C(=C1[O-])/C=C/C(=O)C(=O)O)C(=O)O
Description: The molecule is an oxo carboxylic acid anion that is the conjugate base of 5-(3-carboxy-3-oxoprop-1-en-1-yl)-4-hydroxy-6-oxo-1,6-dihydropyridine-2-carboxylic acid. It is a conjugate base of a 5-(3'-carboxy-3'-oxopropenyl)-4,6-dihydroxypicolinic acid.