[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [C][C][C][=C][S][C][=Ring1][Branch1][C][C][#N]>>[C][C][C][=C][S][C][=Ring1][Branch1][C][C][N]"}, {"from": "gpt", "value": "[C][C][O].[Cl][Ni][Cl].[O].[BH4-1].[Na+1]"}]