[{"from": "human", "value": "Provide a brief overview of this molecule. [N][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is the nitrogen oxoanion formed by loss of a proton from nitrous acid. It has a role as a human metabolite. It is a nitrogen oxoanion, a member of reactive nitrogen species and a monovalent inorganic anion. It is a conjugate base of a nitrous acid."}]