Using CC(=O)OC(C)=O, CC(C)(C)OCCOCC(O)c1cccc(Cl)c1 to produce CC(=O)OC(COCCOC(C)(C)C)c1cccc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.