Using CCOC(=O)c1c(NC(=O)OC(C)(C)C)sc2cc(-c3ccc(F)cc3)ccc12 to produce CC(C)(C)OC(=O)Nc1sc2cc(-c3ccc(F)cc3)ccc2c1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.