[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [C][C][C][C][C][C][C][C][O].[N][=C][Branch1][C][N][N][C][C][C][C@H1][Branch1][C][N][C][=Branch1][C][=O][O]>>[C][C][C][C][C][C][C][C][O][C][=Branch1][C][=O][C@@H1][Branch1][C][N][C][C][C][N][C][=Branch1][C][=N][N]"}, {"from": "gpt", "value": "[O][=S][Branch1][C][Cl][Cl]"}]