[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [C][O][C][O][C][=C][C][=C][Branch1][#C][C][C][Branch1][Ring1][C][#N][C][=C][C][=C][N][=C][Ring1][=Branch1][C][=C][Ring1][S]>>[C][O][C][O][C][=C][C][=C][Branch1][#C][C][C][Branch1][Ring1][C][N][C][=C][C][=C][N][=C][Ring1][=Branch1][C][=C][Ring1][S]"}, {"from": "gpt", "value": "[C][O].[NH4+1].[Ni]"}]