Patent ID: 8530491

Claim:
A compound of Formula I: wherein R is hydrogen or C 1-4 alkyl, W—X—Y is O(CH 2 ) 2-4 O; Ar is an optionally substituted aromatic ring selected from the group consisting of phenyl and naphthyl, or an optionally substituted heteroaromatic ring selected from the group consisting of quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl, pyridyl, indolyl, triazolyl, benzoxazolyl, benzimidazolyl, indolinyl and benzotriazolyl; wherein when Ar is an aromatic ring, it is optionally substituted by at least one group selected from the group consisting of benzoxazolyl, carboxyl, carboxyalkylC(1-3), carboxyalkylC(1-3)oxy, alkylC(1-3)oxycarbonylalkylC(1-3), alkylC(1-3)oxycarbonylalkylC(1-3)oxy, tetrazolyl, tetrazolylalkylC(1-3) and tetrazolylalkylC(1-3)oxy; and Ar is optionally substituted by additional substituents; or a pharmaceutically acceptable salt or substituted derivative thereof.