Using O=Cc1cc([N+](=O)[O-])ccc1Cl, Clc1ccc([Mg]Br)cc1 to produce O=[N+]([O-])c1ccc(Cl)c(C(O)c2ccc(Cl)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.