[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][O][C][=C][C][=C][Branch1][Ring2][C][C][#N][C][=C][Ring1][=Branch2][C]>>[C][C][=C][C][Branch1][Ring2][C][C][#N][=C][C][=C][Ring1][=Branch2][O]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl].[O][=C][Branch1][C][O-1][O].[Na+1]"}]