A phenolic amide, N-p-coumaroyltyramine (1), was isolated as an α-glucosidase inhibitor from methanol extracts of Welsh onion (Allium fistulosum). The inhibitory activity of 1 against a yeast enzyme was as high as Ki 8.4 × 10−7 m. From a structure-activity relationship study of 1 and its related compounds, the occurrence of α-glucosidase inhibitory activity required a p-coumaramide structure, with an amide hydrogen and alkyl or aralkyl substituent on the amide part.
从威尔士洋葱(Allium fistulosum)的
甲醇提取物中分离出一种
酚酰胺--N-对香豆酰
酪胺(1),作为一种α-
葡萄糖苷酶
抑制剂。通过对 1 及其相关化合物的结构-活性关系研究发现,α-
葡萄糖苷酶抑制活性的产生需要对香豆酰酰胺结构,酰胺部分含有酰胺氢和烷基或芳烷基取代基。