[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a valine derivative."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][/C][=Branch1][=N][=C][/C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Br][/S][C][Ring1][=C][=S]"}]