Using COC1=CC(=O)CN(Cc2ccccc2)C1, Clc1cccc([Mg]Br)c1 to produce O=C1C=C(c2cccc(Cl)c2)CN(Cc2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.