Using O=C1CCN(c2ccc3nnc(C(F)(F)F)n3n2)CC1, Clc1ccccc1Br to produce OC1(c2ccccc2Cl)CCN(c2ccc3nnc(C(F)(F)F)n3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.