广防风中的苯乙醇苷类化合物

Phenethyl alcohol glycosides in Epimeredi indica

目的研究广防风属植物广防风 Epimeredi indica的化学成分 ,从中寻找具有生物活性的天然化合物。方法采用硅胶和反相硅胶 RP- 18柱色谱分离 ,运用有机波谱分析确定化合物结构。结果从广防风水提取物中分离得到 3个苯乙醇苷类化合物 ,经鉴定分别为 :2 - (3-甲氧基 - 4 -羟基 )苯基 -乙醇 1- O -α- L - [(1→ 3) -鼠李糖基 - 6 - O-阿魏酰基 ]葡萄糖苷 (I)、2 - (3,4 -二羟基 )苯基 -乙醇 1- O一 α- L- [(1→ 3) -鼠李糖基 - 4 - O-咖啡酰基 ]葡萄糖苷 ( )、2 - (3,4 -二羟基 )苯基 -乙二醇 (1→ 1) (2→ 2 ) [(1→ 3) -鼠李糖基 - 4 - O-咖啡酰基 ]葡萄糖苷 ( )。结论化合物 I为新化合物 ,命名为广防风苷 A。 和 都是首次从该植物中得到。

Object To study the chemical constituents from Epimeredi indica and search for the natu-ral compounds with bioactivities. Methods Three compounds were isolated by a combination of RP-18and silica gel column chromatographies, and their structures were identified by spectral methods. ResultsA novel 2- (3-methoxy-4-hydroxy) phenyl-ethanol 1-O-a-L- [(1→3 )-rhamnopyranosyl- 6-feruloyl] gluco-side ( I ) along with known 2-(3, 4-dihydroxy) phenyl ethanol 1-O-α-L-[(1→3)-rhamnopyranoside-4-O-caffeoyl-] glucoside (verbascoside) ( Ⅱ ), and 2-(3, 4-dihydroxy) phenyl ethanol (1→1) (2→2)-[(1→3)-rhamnopyranoside-4-O-caffeoyl glucoside (oraposide) (Ⅲ) were isolated from E. indica. ConclusionCompound I is a new compound named as epimeredinoside A and compounds Ⅱ and Ⅲ are isolated fromthis plant for the first time.