[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [C][C][C][O][C][C][O][C][=C][C][=C][Branch1][Ring1][C][=O][C][=C][Ring1][Branch2][O][C][C]>>[C][C][C][O][C][C][O][C][=C][C][=C][Branch1][Ring1][C][O][C][=C][Ring1][Branch2][O][C][C]"}, {"from": "gpt", "value": "[C][O].[BH4-1].[Na+1]"}]