Using CCOC(=O)N=C1SC(CBr)CN1c1cccc(C(F)(F)F)c1 to produce CCOC(=O)N=c1sc(C)cn1-c1cccc(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.