[{"from": "human", "value": "Provide a brief overview of this molecule. [C][N+1][Branch1][C][C][Branch1][C][C][C][C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a phosphocholine that is the 4-nitrophenyl ester of choline phosphate. It has a role as an epitope and a hapten."}]