Using CC(CO)(CO)C(=O)O, COC(OC)(c1ccc(Cl)cc1)c1ccc(Cl)cc1 to produce CC1(C(=O)O)COC(c2ccc(Cl)cc2)(c2ccc(Cl)cc2)OC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.