Patent ID: 7396926

Claim:
A compound having the general formula: in which R is a benzyl, 2-thienylmethyl, or cyanomethyl group; R′ is selected from the group consisting of H, physiologically acceptable salt or metal, the ammonium cation, —CHR 2 OCOC(CH 3 ) 3 , in which R 2 is selected from the group consisting of H, lower alkyl; deltabutyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, β-morpholinoethyl, dialkylaminoethyl, and dialkylaminocarbonyloxymethyl; A is selected from the group consisting of O, SO, and SO 2 ; and Z is selected from: wherein R 3 is a linker; X is H, F, Cl, Br, or CO 2 R′; and Y is N, CH, C—CN, or C—CF 3 .