Using CCc1ccc(C2CC(c3nc(N)no3)CN(C(=O)N3CCC(O)CC3)C2)cc1, Cl to produce CCc1ccc(C2CC(c3nc(Cl)no3)CN(C(=O)N3CCC(O)CC3)C2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.