Using COc1ccc(COc2ccc(C(=O)C(Br)C(=O)C(C)C)c(O[Si](C)(C)C(C)(C)C)c2)cc1 to produce CC(C)c1oc2cc(O)ccc2c(=O)c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.