Using O=C(Cn1c(=O)sc2ncc(Cl)cc21)N1CCNCC1, CC(=O)CCl to produce CC(=O)CN1CCN(C(=O)Cn2c(=O)sc3ncc(Cl)cc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.