Using CC(C)[Si](C(C)C)(C(C)C)n1ccc(-c2cc(=O)oc3cc(Br)ccc23)c1 to produce O=c1cc(-c2cc[nH]c2)c2ccc(Br)cc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.