Patent ID: 7465721

Claim:
A compound of the formula wherein A is R 1 , R 2 , R 4 , R 5 and R 6 are independently selected from the group consisting of hydrogen, halogen, OH, alkyl, alkoxy, cyano, nitro and NR 7 R 8 , R 7 and R 8 are independently selected from the group consisting of hydrogen, alkyl and —COR 9 , R 9 is selected from the group consisting of hydrogen, alkyl and alkoxy, R 3 is selected from the group consisting of hydrogen, alkyl and —COR 10 , R 10 is selected from the group consisting of hydrogen, alkyl and alkoxy, and W is selected from the group consisting of a bond, —CH 2 —CH 2 —, —CH═CH—, —O—, —S— and —NR 11 — in which R 11 is hydrogen or alkyl; X is selected from the group consisting of —CO—, —Y—CO—, —O—Y—CO— and —NR 12 —Y—CO—, Y is alkylene or haloalkylene, R 12 is hydrogen, alkyl and —COR 13 , R 13 is selected from the group consisting of hydrogen, alkyl, haloalkyl and alkoxy, AA is, each time that it occurs, selected from the group consisting of a natural amino acid, a natural amino acid the side chain of which is protected by a member selected from the group consisting of: alkyl or aralkyl ester when it bears a carboxylic acid function, alkyl carbamate, aralkyl carbamate, alkyl carboxamide and aralkyl carboxamide when it bears an amine function, alkyl ether, aralkyl ether, alkyl ester and aralkyl ester when it bears an alcohol function, alkyl or aralkyl thioether when it bears a thiol function and an amino acid of the formula NR 14 —(CH 2 ) p —CR 15 R 16 —CO— in which p is 0 or 1, R 14 is hydrogen or alkyl, R 15 is hydrogen or alkyl, R 16 is selected from the group consisting of hydrogen, alkyl, haloalkyl, phenyl, cycloalkyl, cycloalkylalkyl and alkenyl, n is 2 or 3; and finally or —(AA) 2 — is —NR 17 —(CH 2 ) 3 —CH(R 18 )—CO— in which R 17 is hydrogen or alkyl and R 18 is hydrogen or alkyl; R is selected from the group consisting of hydrogen, alkyl and —CO—R 19 R 19 is alkyl; or a salt thereof.