SMILES: C1=NN(C(=O)C(=C1N)Cl)C(=O)/C(=C/C=C/C(=O)[O-])/[O-]
Description: The molecule is a monocarboxylic acid anion arising from deprotonation of the carboxy and enol groups of 5-amino-4-chloro-2-(2-hydroxymuconoyl)pyridazin-3(2H)-one; major species at pH 7.3. It is a conjugate base of a 5-amino-4-chloro-2-(2-hydroxymuconoyl)pyridazin-3(2H)-one.