Using CCc1nn(Cc2ccc(-c3ccccc3C#N)cc2)c(=N)s1, C[Sn](C)(C)N=[N+]=[N-] to produce CCc1nn(Cc2ccc(-c3ccccc3-c3nnn[nH]3)cc2)c(=N)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.