Using COC(=O)c1cc(Cl)c(NC(C)=O)cc1O, BrC1C=CCCC1 to produce COC(=O)c1cc(Cl)c(NC(C)=O)cc1OC1C=CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.