[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [C][O][C][O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][C][=O]>>[C][O][C][O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][C][O]"}, {"from": "gpt", "value": "[C][O].[BH4-1].[Na+1]"}]