Using C=CCBr, C[C@H](c1ccccc1)N1C[C@@H](CO[Si](C)(C)C(C)(C)C)CC1=O to produce C=CC[C@@H]1C(=O)N([C@H](C)c2ccccc2)C[C@H]1CO[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.