Using COS(=O)(=O)OC, O=[N+]([O-])c1ccc(Br)c2ccncc12 to produce CN1CCc2c(Br)ccc([N+](=O)[O-])c2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.