Using Clc1ccc([Mg]Br)cc1, CON(C)C(=O)c1nsc2cc(Br)ccc12 to produce O=C(c1ccc(Cl)cc1)c1nsc2cc(Br)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.