Using CC1CNCC(C)N1c1nc2ccc(C(F)(F)F)cc2s1, CC(C)(C)[Si](C)(C)OCCBr to produce CC1CN(CCO)CC(C)N1c1nc2ccc(C(F)(F)F)cc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.