A compound of the formula (I) or a pharmaceutically acceptable salt thereof: [wherein X is CFH, or CF?2#191, R1 is the moiety represented by the formula: [wherein R2 is (lower)alkyl, R3 is phenyl-(lower)alkyl, and the like.], and the like.] Compounds of formula (I) inhibit DPP-IV activity. They are therefore useful in the treatment of conditions mediated by DPP-IV, such as NIDDM.
化合物的结构式(I)或其药学上可接受的盐:[其中X为CFH,或CF?2#191,R1为由以下结构式表示的基团:[其中R2为(较低)烷基,R3为苯基-(较低)烷基等。],等等。] 公式(I)的化合物抑制
DPP-IV活性。因此,它们在治疗由
DPP-IV介导的疾病,如NID
DM中是有用的。