Using BrBr, O=[N+]([O-])c1cccc2c1cnn2Cc1ccccc1 to produce O=[N+]([O-])c1cccc2c1c(Br)nn2Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.