Using CCOC(=O)C(Cl)C(C)=O, CCOc1ccc(CCl)cc1OCC to produce CCOC(=O)C(Cl)(Cc1ccc(OCC)c(OCC)c1)C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.