[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=C][C][=Branch2][Ring1][Ring1][=C][Branch1][O][C][=C][Ring1][=Branch1][C][C][=Branch1][C][=O][O][N+1][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid that is acetic acid carrying a 2-hydroxy-3-nitrophenyl substituent at C-2. It has a role as a hapten. It is a conjugate acid of a (4-hydroxy-3-nitrophenyl)acetate."}]