Using NNc1ccc([N+](=O)[O-])cc1C(=O)O, CCOC(=O)C(=O)CC(C)=O to produce CCOC(=O)c1cc(C)n(-c2ccc([N+](=O)[O-])cc2C(=O)O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.