Two new phenolic compounds, glicoricone (3) and licofuranone (4), were isolated from a species of licorice brought from the northwestern region of China, and their structures were assigned.Among the twelve licorice constituents examined for the inhibition of monoamine oxidase (MAO), six compounds, 3, 4, genistein (6), licopyranocoumarin (7), licocoumarone (14) and glycyrrhisoflavone (15), inhibited the enzyme with the IC50 (concentration required for 50% inhibition of the enzyme activity) values of 6.0×10-5-1.4×10<-4> M. Glycyrrhizin (1) also inhibited MAO with the IC50 value of 1.6×10<-4>M.
从一种从中国西北地区带来的甘草中分离出两种新的
酚类化合物,即甘草酮(3)和甘草
呋喃酮(4),并确定了其结构。在检测抑制单胺氧化酶(MAO)的十二种甘草成分中,有六种化合物,即
甘草素(3)、甘草次
黄酮(4)、
染料木素(6)、甘草
呋喃香豆素(7)、甘草
香豆酮(14)和甘草异
黄酮(15),抑制该酶的IC50(抑制50%酶活性的浓度)值为6.0×10-5-1.4×10<-4> M。
甘草酸(1)也能抑制MAO,IC50值为1.6×10<-4>M。