Using Br, Nc1ccc(C(c2ccccc2)(c2ccccc2)c2ccccc2)cc1 to produce Brc1ccc(C(c2ccccc2)(c2ccccc2)c2ccccc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.