Using CC(C)(C)OC(=O)N[C@@H]1CC[C@@H](c2cccc(F)c2F)Cn2c(C(O)C(F)(F)F)cnc21, CI to produce COC(c1cnc2n1C[C@H](c1cccc(F)c1F)CC[C@H]2NC(=O)OC(C)(C)C)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.