[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a 1-alkyl-sn-glycero-3-phosphoethanolamine zwitterion in which the alkyl group at C-1 is specified as hexadecyl. It is a tautomer of a 1-hexadecyl-sn-glycero-3-phosphoethanolamine."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][O][C][C@H1][Branch1][=C][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C][NH3+1][O]"}]