Using CN1CCN(c2ccc(OC(F)(F)F)c(Nc3ncc4c(n3)-c3[nH]nc(C(N)=O)c3CC4)c2)CC1, ClCCBr to produce CN1CCN(c2ccc(OC(F)(F)F)c(Nc3ncc4c(n3)-c3c(c(C(N)=O)nn3CCCl)CC4)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.