Using COC(=O)C=CC1C(C(=O)O)C1(C)C, CC1(C)C(C=C(Br)Br)C1C(=O)[O-] to produce CC(C)(C)OC(=O)[C@@H]1[C@H](C#CC(=O)O)C1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.