Using COCn1c(=O)c2c(c3ccc(CC#N)cc31)NCCC2, [N-]=[N+]=[N-] to produce COCn1c(=O)c2c(c3ccc(Cc4nnn[nH]4)cc31)NCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.