[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a 2-acyl-sn-glycero-3-phosphoethanolamine in which the acyl group is specified as octadecanoyl (stearoyl). It has a role as a human blood serum metabolite. It is a lysophosphatidylethanolamine 18:0 and a 2-acyl-sn-glycero-3-phosphoethanolamine. It is functionally related to an octadecanoic acid. It is a tautomer of a 2-octadecanoyl-sn-glycero-3-phosphoethanolamine zwitterion."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][C@H1][Branch1][Ring1][C][O][C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C][N]"}]