Patent ID: 6927236

Claim:
A compound of formula (I) where R 1 is (a) H, or (b) a radical selected from —C 1 -C 6 -alkyl, —C 2 -C 6 -alkenyl, —C 2 -C 6 -alkynyl or —C 6 -C 10 -aryl, which is substituted once or twice by (b1) —OH, (b2) ═O, (b3) —O—(C 1 -C 6 -alkyl), (b4) —O—(C 2 -C 6 -alkenyl), (b5) —C 6 -C 10 -aryl, (b6) —NH—C 1 -C 6 -alkyl, (b7) —NH—C 2 -C 6 -alkenyl, (b8) —NH 2 or (b9) fluorine, chlorine, bromine or iodine, in which the substituents (b3) to (b8) is optionally substituted by —CN, -amide or -oxime functions, or (c) —(C 1 -C 4 -alkyl)-(C 6 -C 10 -aryl), or (d) —NH 2 , —NH—(C 1 -C 6 -alkyl), or —NH—(C 2 -C 6 -alkenyl), R 2 is H, methyl, ethyl, n-propyl, isopropyl, n-butyl or iso-butyl, R 3 is a radical which is composed of from 1 to 10 amino acids and which is optionally N-terminally protected, R 4 is H, —C 1 -C6-alkyl, or —CO—(C 1 -C 6 -alkyl), and p is an integer 0, 1 or 2, with the exception of the compounds of the formula (I) in which, at the same time, R 1 is H, R 2 is H, R 3 is —CO—CH 3 , R 4 is H, and p is 0 or 1, and/or a stereoisomeric form of the compound of the formula (I) and/or mixtures of this form in any ratio, and/or a physiologically tolerated salt of the compound of the formula (I).