Using CN1C(=O)CCc2ccc(NC(=O)c3ccc(Cl)cc3NC3CCN(Cc4ccccc4)CC3)cc21 to produce CN1C(=O)CCc2ccc(NC(=O)c3ccc(Cl)cc3NC3CCNCC3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.