[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [Br][Br].[C][C][=Branch1][C][=O][C][C][C][C][C][C][Ring1][=Branch1]>>[O][=C][Branch1][Ring1][C][Br][C][C][C][C][C][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][O].[O][=S][Branch1][C][O-1][O-1].[Na+1].[Na+1]"}]