| 摘要 |
<p>Compounds of formula (I) are disclosed, as well as their tautomers, enantiomers, diastereomers and physiologically tolerable salts, a process for preparing the same and medicaments with an antidiabetic effect which contain these substances. In the formula, A is a sulphur atom or the group -CH=CH-; R is hydrogen or a -CH2-OR5 group in which R5 stands for hydrogen or acyl; R1 and R3 are hydrogen or methyl; and R2 is methyl or t-butyl.</p> |
