Using COC(=O)c1cnc(Cl)c([N+](=O)[O-])c1, CCOC(=O)CO to produce CCOC(=O)COc1ncc(C(=O)OC)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.