Patent ID: 8124587

Claim:
A compound of the formula I: and pharmaceutically suitable salts of this compound, in which XR 1 =—OH, —OCH 2 —COOR 4 , —OSO 2 —R 5 , —OCOOR 5 , —OCO—R 6 , —NR 3 CH 2 —COOR 4 , —NR 3 SO 2 —R 5 , —NR 3 COOR 5 , or —NR 3 CO—R 6 ; R 3 =H or a branched or unbranched alkyl group having 1-6 C atoms, n=0, 1, 2, 3 or 4, R 4 =H or a branched or unbranched alkyl group having 1-6 C atoms, R 5 =a branched or unbranched alkyl group having 1-7 C atoms which is unsubstituted or substituted by R 7 , or an aryl or heteroaryl group which is unsubstituted or substituted by R 7 , or an aralkyl or heteroaralkyl group which is unsubstituted or substituted by R 7 , or a cyclohexylmethyl group R 7 =halogen, CN, NHR 3 , NHCO—R 3 , —CH 2 —NHR 3 , NO 2 , OR 3 , SR 3 , —COOR 4 or —CH 2 —COOR 4 and R 3 and R 4 as defined above R 6 =a branched or unbranched alkyl group having 1-8 C atoms, which is unsubstituted or substituted by R 7 , or cycloalkyl or a cyclohexylmethyl, but also —COOR 4 , where R 4 is as defined above; and R 6 may also be substituted by R 7 which is as defined above, and R 2 =a group selected from P2=any natural or unnatural α-amino acid, that is glycine or has the following structure with R 3 as defined above, Y=CH or N, and, in the case of R 8 ═H, may only be N, R 8 =H or a branched or unbranched alkyl group having 1-8 C atoms, which is unsubstituted or substituted by R 7 , or an aryl or heteroaryl group which is unsubstituted or substituted by R 7 , or an aralkyl or heteroaralkyl group which is unsubstituted or substituted by R 7 , or a cyclohexylmethyl group, and where R 7 is defined as described above, or P2=any α-azaimino acid of the following structure q=0, 1 or 2, and a carbon atom of the ring may be substituted by R 7 which is as defined above; and wherein P2 is not glycine alkylated on the nitrogen atom.