Using CC(C)(C)[Si](C)(C)O[C@H]1CC[C@@H](N2CCC(Cc3c(Cl)cc(O)cc3Cl)C2=O)CC1, CC(C)Br to produce CC(C)Oc1cc(Cl)c(CC2CCN([C@H]3CC[C@@H](O[Si](C)(C)C(C)(C)C)CC3)C2=O)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.