Using CC(=O)S[C@H]1C[C@H](COCc2cc(F)c(F)cc2F)N(C(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)N1C[C@H](S)C[C@H]1COCc1cc(F)c(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.