[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=O]>>[C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][O]"}, {"from": "gpt", "value": "[C][O].[O].[BH4-1].[Na+1]"}]