[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][O][C][=Branch1][C][=O][C][C][C][C][Branch1][C][O][C][C][Ring1][#Branch1]>>[O][C][C][C][C][C][Branch1][C][O][C][C][Ring1][#Branch1]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[AlH4-1].[Li+1]"}]