SMILES: C1=CC(=CC=C1CC(=O)[O-])[N+](=O)[O-]
Description: The molecule is a monocarboxylic acid anion resulting from the removal of a proton from the carboxy group of (4-nitrophenyl)acetic acid; it is the major species at pH 7.3. It is a conjugate base of a (4-nitrophenyl)acetic acid.