[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a phenolate anion that is the conjugate base of 4-nitrocatechol arising from selective deprotonation of the hydroxy group at the position para to the nitro group; the major species at pH 7.3. It has a role as a human xenobiotic metabolite. It is a conjugate base of a 4-nitrocatechol."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][=C][=C][Branch1][#Branch2][C][=C][Ring1][=Branch1][N+1][=Branch1][C][=O][O-1][O][O-1]"}]