Using CC(C)(C)OC(=O)N1CCC[C@@H]1[C@H](c1ccc(Cl)c(Cl)c1)N1C(=O)c2ccccc2C1=O to produce CN1CCC[C@@H]1[C@H](c1ccc(Cl)c(Cl)c1)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.