Using CC(C)(C)OC(=O)N1C[C@@H]2C[C@@H]2[C@H]1CNC(=O)C(F)(F)F to produce O=C(NC[C@H]1NC[C@@H]2C[C@@H]21)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.