Qi structure formulas of Yi Seed compounds , are as follows:Wherein R1, R2, R3, R4, R5, R6, R7, R8, T, X, Y With Z Department Ding Righteousness as illustrated Books Zhong Suo. This Hair is bright also to disclose the method for inhibiting two peptide base victory peptase IV using this compound Come or controlling Treatment type II diabetes.一種化合物,其結構式如下:其中R1、R2、R3、R4、R5、R6、R7、R8、T、X、Y與Z係如說明書中所定義。本發明亦揭示利用此化合物來抑制二胜肽基胜肽酶Ⅳ或治療Ⅱ型糖尿病之方法。