Using Cc1c(NCc2ccc(Oc3ccc(CCC(=O)O)cc3)cc2)cccc1[N+](=O)[O-], CO to produce COC(=O)CCc1ccc(Oc2ccc(CNc3cccc([N+](=O)[O-])c3C)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.