[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [O][=C][C@@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C][O]>>[O][C][C@@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C][O]"}, {"from": "gpt", "value": "[C][C][O][C][Branch1][C][C][=O].[C][O].[BH4-1].[Na+1]"}]