Using CC(C)(C)OC(=O)N1CCc2nc(N)ncc2C1, O=C(Cl)c1cccc(Cl)c1 to produce CC(C)(C)OC(=O)N1CCc2nc(NC(=O)c3cccc(Cl)c3)ncc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.