Using CCOC(C)=O, O=c1[nH]c(=O)c2ccc(Cl)cc2[nH]1 to produce CCOC(=O)Cn1c(=O)[nH]c(=O)c2ccc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.