[{"from": "human", "value": "Based on the given chemical reaction, suggest some possible reagents. [Br][C][C][C][C][C][C][Br].[C][C][Branch1][Ring2][C][C][O][C][C][O]>>[C][C][Branch1][Ring2][C][C][O][C][C][O][C][C][C][C][C][C][Br]"}, {"from": "gpt", "value": "[C][C][O][C][C][O][Ring1][=Branch1].[O].[Cl-1].[H-1].[NH4+1].[Na+1]"}]