Using O=C1CCC(=O)N1Br, CC(Cn1ncc2ccc(O)cc21)O[Si](C)(C)C(C)(C)C to produce CC(Cn1ncc2ccc(O)c(Br)c21)O[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.