Hepatoprotective Aliphatic Glycosides from Three Goodyera Species.
作者:Xiao-Ming DU、Ning-Yi SUN、Yang CHEN、Nobuto IRINO、Yukihiro SHOYAMA
DOI:10.1248/bpb.23.731
日期:——
Hepatoprotective aliphatic glycosides 3-(S)-3-β-D-glucopyranosyloxybutanolide (1) and its congener, 3-(S)-3-β-D-glucopyranosyloxy-4-hydroxybutanoic acid (2) were isolated as major constituents from the whole plants of three Goodyera species, G. schlechtendaliana REICHB. fil., G. matsumurana SCHLTR. and G. discolor KER-GAWL. The structures of 1 and 2 have been determined by NMR, MS spectroscopic and chemical means. Compound 1 was converted into its methyl ester form (5) during the purification step, when the lactone ring was cleaved by catalysis of silica gel with the CHCl3-MeOH-H2O as a solvent. On the other hand, 1 was obtained in a high yield by the same purification procedure without MeOH. Based on this fact, a simple and economic method for the purification of 1 was confirmed. Compounds 1 and 2 were found to have a hepatoprotective effect on liver injury induced by carbon tetrachloride in primary cultured rat hepatocytes.
保肝脂肪族糖苷 3-(S)-3-β-D-吡喃葡萄糖氧基丁内酯 (1) 及其同源物 3-(S)-3-β-D-吡喃葡萄糖氧基-4-羟基丁酸 (2) 作为主要成分从三个 Goodyera 物种 G. schlechtendaliana REICHB 的全株。 fil.,G. matsumurana SCHLTR。 G. KER-GAWL 变色。 1和2的结构已通过NMR、MS光谱和化学手段确定。在纯化步骤中,以CHCl3-MeOH-H2O为溶剂,通过硅胶催化,内酯环裂解,化合物1转化为其甲酯形式(5)。另一方面,在没有MeOH的情况下通过相同的纯化程序以高产率获得1。基于这一事实,确定了一种简单且经济的纯化1的方法。发现化合物1和2对原代培养的大鼠肝细胞由四氯化碳引起的肝损伤具有保肝作用。