Substituted propane-phosphonous acid compounds

Abstract From the Canadian patent

Substituted Propane-Phosphonous Acid Compounds Abstract of the Disclosure, The compounds of the formula I, in which one of the groups R1, R2 and R3 represents hydrogen C1-8-alkyl, C3-6-cycloalkyl, phenyl optionally substituted by halogeno, C1-4-alkyl, C1-4-alkoxy and/or trifluoromethyl or, C7-10-phenylalkyl optionally substituted in the phenyl moiety by halogeno, C1-4-alkyl, C1-4-alkoxy and/or trifluormethyl and the, other two are hydrogen, or salts thereof. These compounds have valuable pharmaceutical properties.