| 摘要 |
<p>The present invention relates to compounds of formula (I), wherein R1, R2, R3, R4 and X are as defined in the description and claims, and pharmaceutically acceptable salts thereof. The compounds are useful for the treatment and/or prophylaxis of diseases which are associated with DPP IV, such as diabetes, particularly non-insulin dependent diabetes mellitus, and impaired glucose tolerance.</p> |
