通过改进的纯化程序从白桑的根中重新检测含N的糖,导致分离出18种含N的糖,其中包括7种从桑树叶片中分离得到的糖。这些含N的糖是1-deoxynojirimycin(1),
N-甲基-1-deoxynojirimycin(2),fagomine(3),3-ep-fagomine(4),1,4-dideoxy-1,4-imino-
D-阿拉伯糖醇(5),1,4-二甲氧基-1,4-亚
氨基-
D-核糖醇(6),花椰菜素B2(1 alpha,2 beta,3 alpha,4 beta-tetrahydroxy-nor-tropane,7), calystegin C1(1 alpha,2 beta,3 alpha,4 beta,6 alpha-pentahydroxy-nor-tropane,8),1,4-dideoxy-1,4-imino-(2-O-beta-D-Dydropyranosyl) -D-