Using COc1ccc2c(c1)C(CN=[N+]=[N-])CN(C(=O)OC(C)(C)C)C2 to produce COc1ccc2c(c1)C(CN)CN(C(=O)OC(C)(C)C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.