Using OCCBr, CC1(C)CC(Nc2ncccc2C(=O)Nc2cccc(Cl)c2)CC(C)(C)N1 to produce CC1(C)CC(Nc2ncccc2C(=O)Nc2cccc(Cl)c2)CC(C)(C)N1CCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.