Using CCOC(=O)CCl, O=c1[nH]cc(-c2ccc(Cl)cc2)n1C1CC1 to produce CCOC(=O)Cn1cc(-c2ccc(Cl)cc2)n(C2CC2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.