Using CCOC(=O)c1cc(OCC)c(OCC)c(OCCc2ccc(Cl)cc2Cl)c1 to produce CCOc1cc(C(=O)O)cc(OCCc2ccc(Cl)cc2Cl)c1OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.