Using BrCc1cccc(CBr)c1, O=[N+]([O-])c1c(Br)n[nH]c1Br to produce O=[N+]([O-])c1c(Br)nn(Cc2cccc(Cn3nc(Br)c([N+](=O)[O-])c3Br)c2)c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.