[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][C][C][C][C][C][C][C][/C][=C][/C@H1][Branch1][N][C@H1][Branch1][Ring1][C][O][N][C][=Branch1][C][=O][C][O]"}, {"from": "gpt", "value": "The molecule is a N-acylsphingosine that has an acetamido group at position 2."}]