[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a sphingomyelin d18:1 in which the ceramide N-acyl group is specified as icosanoyl. It has a role as an animal metabolite. It is a sphingomyelin 38:1 and a sphingomyelin d18:1. It is functionally related to an icosanoic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch2][Ring1][Branch1][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C][N+1][Branch1][C][C][Branch1][C][C][C][C@@H1][Branch1][S][/C][=C][/C][C][C][C][C][C][C][C][C][C][C][C][C][O]"}]