[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [C][N][C][C][O].[N][#C][C][=C][C][=C][C][Branch1][Ring1][C][Br][=C][Ring1][Branch2]>>[C][N][Branch1][Ring2][C][C][O][C][C][=C][C][=C][C][Branch1][Ring1][C][#N][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[Cl][C][Cl]"}]