Patent ID: 8664203

Claim:
A compound of formula I wherein R 1 represents (C 1 -C 6 )alkoxy; Y represents a bond and Z represents hydrogen; or Y represents (C 1 -C 3 )alkandiyl and Z represents hydrogen, hydroxy, —COOH, —COOR 5 , —P(O)(OH) 2 , —P(O)(OR 6 ) 2 , —P(O)(NHR 7 ) 2 or phenyl, wherein the phenyl is substituted with —P(O)(OH) 2 or —P(O)(OR 8 ) 2 ; W represents a group selected from R 2 represents hydrogen; halogen; (C 1 -C 4 )alkyl which is monosubstituted with (C 1 -C 4 )alkoxy, —COOH or —COOR 9 ; (C 2 -C 4 )alkenyl which is monosubstituted with (C 1 -C 4 )alkoxy, —COOH or —COOR 9 ; phenyl which is unsubstituted or monosubstituted with halogen; (C 1 -C 4 )alkyl-amino, wherein the alkyl-group is monosubstituted with hydroxy, (C 1 -C 4 )alkoxy, —COOH or —COOR 9 ; di-(C 1 -C 4 )alkyl-amino; heterocyclyl which is unsubstituted or monosubstituted with (C 1 -C 4 )alkyl or (C 1 -C 4 )alkoxy; or 2-methoxymethyl-cycloprop-1-yl; R 3 represents aryl which is unsubstituted or mono- or di-substituted, wherein the substituents are independently selected from the group consisting of halogen, (C 1 -C 4 )alkyl, (C 1 -C 4 )alkoxy and phenoxy; R 4 represents halogen; (C 1 -C 4 )alkyl which is monosubstituted with (C 1 -C 4 )alkoxy, —COOH, or —COOR 9 ; (C 2 -C 4 )alkenyl which is monosubstituted with (C 1 -C 4 )alkoxy or —COOR 9 ; phenyl; or di-(C 1 -C 6 )alkyl-amino; R 5 represents (C 1 -C 4 )alkyl; R 6 represents (C 1 -C 4 )alkyl, (C 1 -C 4 )alkyl-C(O)—OCH 2 — or (C 1 -C 4 )alkoxy-C(O)—OCH 2 —; R 7 represents (C 1 -C 4 )alkoxy-C(O)—(C 1 -C 4 )alkyl-; R 8 represents (C 1 -C 4 )alkyl; R 9 represents (C 1 -C 4 )alkyl; or a pharmaceutically acceptable salt of such a compound.