abstract |
A product of O-acylated hydroxycarboxylic acid and amino acid of the general formula (I) is disclosed, in the AS is a proteinogenic or synthetically produced amino acid of the general formula (II), which is preferably D, L or racemic, wherein R 1 , R 2 , R 3 and / or R 4 , R 5 have the meaning given in the claims and the description, its preparation and its use. |