Using Cc1c(Cl)cc[n+]([O-])c1C, OCC1COC2(CCOCC2)OC1 to produce Cc1c(OCC2COC3(CCOCC3)OC2)cc[n+]([O-])c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.