[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [C][#C][C][O].[C][O][C][=N][C][Branch1][C][Br][=C][C][=C][Ring1][#Branch1][Cl]>>[C][O][C][=N][C][Branch1][Branch1][C][#C][C][O][=C][C][=C][Ring1][#Branch2][Cl]"}, {"from": "gpt", "value": "[C][C][N][Branch1][Ring1][C][C][C][C].[C][C][O][C][Branch1][C][C][=O].[I][Cu][I].[O]"}]