Using Cc1nc(O)ccc1-c1ccc([C@H]2OC(C)(C)N(C(=O)C(F)F)[C@@H]2CF)cc1, ClCCl to produce CC1(C)O[C@H](c2ccc(-c3ccc(CCl)nc3)cc2)[C@@H](CF)N1C(=O)C(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.