Using CC(C)(C)[Si](C)(C)OCC=O, C[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H]2Cc3ccc(Br)nc3N21 to produce C[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H]2Cc3ccc(C(O)CO[Si](C)(C)C(C)(C)C)nc3N21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.