Using O=C1CCC(=O)N1Br, Cc1ccc(-c2nc3ccccc3o2)cc1O[Si](C)(C)C(C)(C)C to produce CC(C)(C)[Si](C)(C)Oc1cc(-c2nc3ccccc3o2)ccc1CBr, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.