Using COC(=O)Cc1c(C)cc(Br)cc1C, C=C(OC)O[Si](C)(C)C(C)(C)C to produce COC(=O)CC(O)Cc1c(C)cc(Br)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.