Using BrP(Br)(c1ccccc1)(c1ccccc1)c1ccccc1, Nc1ncc2ncn(CCO)c2n1 to produce Nc1ncc2ncn(CCBr)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.