[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a 1-O-acyl-N-acylsphingosine in which the N- and O-acyl groups are specified as acetyl and stearoyl (octadecanoyl) respectively. It is functionally related to a N-acetylsphingosine and an octadecanoic acid."}, {"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][C@@H1][Branch2][Ring1][Ring2][C@@H1][Branch1][S][/C][=C][/C][C][C][C][C][C][C][C][C][C][C][C][C][O][N][C][=Branch1][C][=O][C]"}]