Using COC/C=C/B1OC(C)(C)C(C)(C)O1, COC(=O)c1cc(Br)c(C)c(Br)c1 to produce COC/C=C/c1cc(C(=O)OC)cc(Br)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.