2-[3-(2-Hydroxy-1,1-Dihydroxymethyl-Ethylamino)-Propylamino]-2-Hydroxymethyl-Propane-1,3-Diol1,3-Bis[tris(hydroxymethyl)methylamino]propaneBIS-TRIS PROPANE1,3-bis[tris(Hydroxymethyl)methyl-amino]-propane2,2'-(Propane-1,3-diyldiimino)bis[2-(hydroxymethyl)propane-1,3-diol]1,3-bis(tris(hydroxymethyl)methylamino)propane2-[3-(2-HYDROXY-1,1-DIHYDROXYMETHYL-ETHYLAMINO)-PROPYLAMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOLbis-tris propane