[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][C][=Branch1][C][=O][N][Branch2][Ring1][Branch1][C][C][C][N][Branch1][=Branch1][C][C@H1][Ring1][=Branch1][C][C][C][C][=C][C][=C][S][Ring1][Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is the (R)-enantiomer of 3-methylthiofentanyl. It is an enantiomer of a (3S)-methylthiofentanyl."}]