Using COC1=C(c2c(Cl)cc(Br)cc2OC)C(=O)CC1, C#CCBr to produce C#CCC1CC(OC)=C(c2c(Cl)cc(Br)cc2OC)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.