Using CC(=O)OCCCCOc1c(Cl)cc(O)cc1Cl, ClCCC(Cl)(Cl)Cl to produce CC(=O)OCCCCOc1c(Cl)cc(OCC=C(Cl)Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.