[{"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][C][Br][C][Branch1][Ring1][C][#N][=C][Ring1][=Branch2]>>[C][O][C][=C][C][=C][Branch1][C][Br][C][Branch1][Ring1][C][N][=C][Ring1][=Branch2]"}, {"from": "gpt", "value": "[B].[C][C][C][O][C][Ring1][Branch1]"}]