Patent ID: 8148413

Claim:
A compound of the formula: wherein: R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, F, Cl, Br, hydroxy, carboxy, —CF 3 , methyl, ethyl, propyl, —CH 2 —C(O)OH, —(CH 2 ) 2 —C(O)OH, —CH 2 —OH, —(CH 2 ) 2 —OH, —O—CH 2 —C(O)OH, —(CH 2 ) 2 —N(CH 3 ) 2 , —O—(CH 2 ) 2 —C(O)OH and —CO—NR 13 R 14 ; R 13 and R 14 together with the nitrogen to which they are attached form a morpholine ring; R 5 is benzyl, wherein the phenyl part may be substituted with one or more substituents independently selected from R 20 ; R 6 is hydrogen; R 20 is selected from the group consisting of halogen, cyano, CF 3 , hydroxy, carboxy, —C(O)—O—C 1-6 -alkyl, C 1-6 -alkoxy, C 1-6 -alkyl, carboxy-C 1-6 -alkyl, amino-C 1-6 -alkyl, hydroxy-C 1-6 -alkyl, —NR 22 R 23 and —CONR 24 R 25 ; R 22 and R 23 are independently selected from the group consisting of hydrogen, —C(O)—CH 3 , methyl, ethyl and propyl; R 24 and R 25 are independently selected from the group consisting of hydrogen, methyl, ethyl and propyl; R 40 is hydrogen; R 41 is —CH 2 CO 2 H; or a salt thereof with any pharmaceutically acceptable acid or base.