| 摘要 |
<p>A compound represented by the following formula (I), a prodrug thereof, or a pharmaceutically acceptable salt of either. The compound has high DPP-IV inhibitory activity and has been improved in safety, toxicity, etc. (I) [In the formula, R<1> represents hydrogen, optionally substituted alkyl, etc.; R<2> represents hydrogen, optionally substituted alkyl, optionally substituted aryl, etc.; R<3> represents hydrogen, optionally substituted aryl, etc.; and -Y-NH2 represents, e.g., a group represented by the formula (A) (wherein m is 0, 1, or 2; and R<4> is absent or one or two R<4>'s are present, the R<4>'s each independently representing optionally substituted alkyl, etc.).]</p> |
