[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is the phosphate of choline; and the parent compound of the phosphocholine family. It has a role as an epitope, a hapten, a human metabolite, a mouse metabolite and an allergen. It is a conjugate acid of a choline phosphate(1-)."}, {"from": "gpt", "value": "[C][N+1][Branch1][C][C][Branch1][C][C][C][C][O][P][=Branch1][C][=O][Branch1][C][O][O]"}]