Using CCOC(COCCCCO)OCC, Oc1c(Cl)cc(OCC=C(Cl)Cl)cc1Cl to produce CCOC(COCCCCOc1c(Cl)cc(OCC=C(Cl)Cl)cc1Cl)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.