Using COc1ccc(CCC(=O)CCC(Cc2ccc(OC)c(OC)c2)[N+](=O)[O-])cc1, OCCO to produce COc1ccc(CCC2(CCC(Cc3ccc(OC)c(OC)c3)[N+](=O)[O-])OCCO2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.