Using CCCC(=O)OC[C@H]1CN(C(=O)OC(C)(C)C)C([C@@H](O)[C@H](Cc2cc(F)cc(F)c2)NC(C)=O)CO1 to produce CCCC(=O)OC[C@H]1CN[C@@H]([C@@H](O)[C@H](Cc2cc(F)cc(F)c2)NC(C)=O)CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.