Using Nc1cn2nc(Oc3cccc(NC(=O)c4cccc(C(F)(F)F)c4)c3)ccc2n1, O=C(Cl)CCl to produce O=C(CCl)Nc1cn2nc(Oc3cccc(NC(=O)c4cccc(C(F)(F)F)c4)c3)ccc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.