Using BrBr, COC(=O)c1nc(-c2ccc([Si](C)(C)C)c(F)c2)cc(NC(C)=O)c1Cl to produce COC(=O)c1nc(-c2ccc(Br)c(F)c2)cc(NC(C)=O)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.