Using COC(=O)c1ccc(CN=[N+]=[N-])nc1, CC(C)(C)OC(=O)OC(=O)OC(C)(C)C to produce COC(=O)c1ccc(CNC(=O)OC(C)(C)C)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.