Using CON(C)C(=O)c1cc(Cl)cc(Cl)c1, C#Cc1ccc(Br)cc1 to produce O=C(C#Cc1ccc(Br)cc1)c1cc(Cl)cc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.