[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][C][C][C][Branch1][S][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][O][P][=Branch1][C][=O][Branch1][C][O][O]"}, {"from": "gpt", "value": "The molecule is a carboxyalkyl phosphate that is octadecanoic acid carrying a phosphonooxy substituent at position 12. It is functionally related to an octadecanoic acid. It is a conjugate acid of a 12-(phosphonooxy)octadecanoate(3-)."}]