[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a sphingomyelin d18:1 in which the ceramide N-acyl group is specified as (11Z)-icosenoyl. It has a role as a mouse metabolite. It is a sphingomyelin d18:1 and a sphingomyelin 38:2. It is functionally related to an (11Z)-icos-11-enoic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][/C][=C][/C@H1][Branch2][Ring2][P][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][N][C][=Branch1][C][=O][C][C][C][C][C][C][C][C][C][/C][=C][\\C][C][C][C][C][C][C][C][O]"}]