Using O=C(NC1=NC2(CCS1)c1cc(Br)ccc1Oc1cnc(Cl)cc12)c1ccc([N+](=O)[O-])cc1 to produce NC1=NC2(CCS1)c1cc(Br)ccc1Oc1cnc(Cl)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.