Using OB(O)c1ccc(C(F)(F)F)cc1, CCOC(=O)COC(=O)N1CCN(c2ccc(Br)cn2)CC1 to produce CCOC(=O)COC(=O)N1CCN(c2ccc(-c3ccc(C(F)(F)F)cc3)cn2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.