The present invention relates to substituted arylsulphonylaminomethyl-phosphonic acid derivatives of general formula wherein R, X, Y and Z are defined as in claim 1, the tautomers, enantiomers, diastereomers, mixtures thereof and salts thereof which have valuable pharmacological properties, particularly the suppression of the interaction of glycogen phosphorylase a with the GL subunit of glycogen-associated protein phosphatase 1 (PP1), and their use as pharmaceutical compositions.