[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 24 carbons and 0 double bonds and is 2-hydroxylated. It is functionally related to a 15-methylhexadecasphing-4-enine."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][Branch2][Branch1][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][P][/C][=C][/C][C][C][C][C][C][C][C][C][C][Branch1][C][C][C][O][O]"}]