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