Using [N-]=[N+]=[N-], O=c1c(CBr)cn(-c2ccccc2Cl)c2cc(Cl)ccc12 to produce [N-]=[N+]=NCc1cn(-c2ccccc2Cl)c2cc(Cl)ccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.