Using OB(O)C1CC1, C=C(C)C1NC(=O)CC(c2cccc(Cl)c2)C12C(=O)Nc1cc(Br)ccc12 to produce C=C(C)C1NC(=O)CC(c2cccc(Cl)c2)C12C(=O)Nc1cc(C3CC3)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.