2-(bis-(2-Hydroxyethyl)amino)-2-(hydroxymethyl)propane-1,3-diol

for the following products 2,2-bis-(Hydroxymethyl)-2,2',2''-nitrilotriethanol | bis-(2-Hydroxyethyl)-amino-tris-(hydroxymethyl)-methane | bis-Tris and 2-(bis-(2-Hydroxyethyl)amino)-2-(hydroxymethyl)propane-1,3-diol