[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a N-acyl-4-hydroxy-15-methylhexadecasphinganine in which the acyl group has 17 carbons and 0 double bonds. It is functionally related to a 15-methylhexadecaphytosphingosine."}, {"from": "gpt", "value": "[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][Branch2][Ring1][Ring2][C@@H1][Branch1][S][C][C][C][C][C][C][C][C][C][C][C][Branch1][C][C][C][O][O]"}]