Using O=[N+]([O-])O, CCOC(=O)N1C2CCC1c1c(cccc1C(=O)OC)C2 to produce CCOC(=O)N1C2CCC1c1cc(C(=O)OC)cc([N+](=O)[O-])c1C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.