Using C[Si](C)(C)C(F)(F)F, CC(OCC1(c2ccccc2)CCN(C(=O)OC(C)(C)C)CC1)c1cc(C(F)(F)F)cc(Br)n1 to produce CC(OCC1(c2ccccc2)CCNCC1)c1cc(C(F)(F)F)cc(C(F)(F)F)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.