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