Using CC(=O)OC(C)=O, O=C(N1CCc2c(O)ccc(Br)c2CC1)C(F)(F)F to produce CC(=O)Oc1ccc(Br)c2c1CCN(C(=O)C(F)(F)F)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.