[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [C][S][=Branch1][C][=O][=Branch1][C][=O][C][=C][C][=C][Branch1][C][N][C][Branch1][C][Cl][=C][Ring1][Branch2].[I-1]>>[C][S][=Branch1][C][=O][=Branch1][C][=O][C][=C][C][=C][Branch1][C][I][C][Branch1][C][Cl][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][#N].[Cl].[O][=N][O-1].[K+1].[Na+1]"}]