Using O=N[O-], Cc1cc(-n2ccc3oc(Br)cc3c2=O)ccc1N to produce O=c1c2cc(Br)oc2ccn1-c1ccc2[nH]ncc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.