Using CCN(c1nc(Cl)ccc1NC(C)(C)C)C1CCN(Cc2ccccc2)CC1 to produce CCN(c1nc(Cl)ccc1NC(C)(C)C)C1CCNCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.