Using CCOC(=O)C(=O)OCC, CCC(=O)C(C)=Cc1ccc(Cl)cc1 to produce CCOC(=O)C(=O)C(C)C(=O)C(C)=Cc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.