[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=Branch2][Ring1][=Branch2][=C][C][=C][Ring1][=Branch1][C][O][P][=Branch1][C][=O][Branch1][O][C][C][C][C][C][C][=Branch1][C][=O][O][O][N+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a C-nitro compound that is 6-phosphonohexanoic acid in which the phosphono function is esterified with (4-nitrophenyl)methanol; a phosphonate transition state analogue with affinity for catalytic antibody 7B9. It is a C-nitro compound, a phosphonic ester and a carboxylic acid."}]