Using COC(=O)c1nc(C(F)(F)F)n2c1C(C)N(C(=O)OC(C)(C)C)CC2 to produce COC(=O)c1nc(C(F)(F)F)n2c1C(C)NCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.