Using COC(=O)CN1C(=O)c2c(cccc2C(F)(F)F)[C@H]2CN(C(=O)OC(C)(C)C)C[C@@H]21 to produce CC(C)(C)OC(=O)N1C[C@@H]2c3cccc(C(F)(F)F)c3C(=O)N(CC(=O)O)[C@H]2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.