[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][=C][O][C][C][C][Ring1][=Branch1].[O][C][C][C][C][Br]>>[Br][C][C][C][C][O][C][C][C][C][C][O][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][=C][C][=C][Branch1][=Branch2][S][=Branch1][C][=O][=Branch1][C][=O][O][C][=C][Ring1][#Branch2].[Cl][C][Cl].[O]"}]