The high antiradiation activity and low toxicity of sodium 3-amino-2-hydroxypropyl hydrogen phosphorothioate (1) suggested the introduction of hydroxyl groups into other types of radioprotective phosphorothioates. A number of such compounds were synthesized, including S-3-(3-aminopropylamino)-2-hydroxypropyl dihydrogen phosphorothioate (1 1, n= 3), S-2-(3-amino-2-hydroxypropylamino) ethyl dihydrogen phosphorothioate (20) and its ...