SUBSTITUTED 4-AMINO-3-HYDROXYBUTYRIC ACID DERIVATIVES AND MANUFACTURE

摘要

The invention relates to compounds of the formula in which R<1> is absent or is hydrogen, alkyl or acyl, A is a carboxylic acid radical or an amino acid radical, and B is an amino acid radical, and R<2>, R<3> and R<4> are as defined in the description, and their salts, their preparation, pharmaceutical preparations containing them, and their use as medicaments, as well as intermediates for the preparation of these compounds.