Using COc1cncnc1N1CCN(CCCc2c[nH]c3ccc(N)cc23)CC1, O=C(Cl)CCCCl to produce COc1cncnc1N1CCN(CCCc2c[nH]c3ccc(NC(=O)CCCCl)cc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.