[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [C][C][C@H1][C][O][C][C@H1][Branch1][C][C][N][Ring1][#Branch1][C][=Branch1][C][=O][O][C][Branch1][C][C][Branch1][C][C][C]>>[C][C][C@H1][C][O][C][C@H1][Branch1][C][C][N][Ring1][#Branch1]"}, {"from": "gpt", "value": "[C][O].[Cl]"}]