[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a N-acylsphingosine in which the ceramide N-acyl group is specified as eicosanoyl. It has a role as a mouse metabolite. It is a N-acylsphingosine and a Cer(d38:1). 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][Branch1][Ring1][C][O][C@@H1][Branch1][S][/C][=C][/C][C][C][C][C][C][C][C][C][C][C][C][C][O]"}]