金荞麦块根化学成分的研究

Chemical constituents from root tubers of Fagopyrum dibotrys

目的研究金荞麦Fagopyrum dibotrys块根中的化学成分。方法采用色谱分离技术进行分离和纯化,并根据谱学数据鉴定化合物的结构。结果从金荞麦块根的甲醇提取物中分离得到14个化合物,分别鉴定为木犀草素（1）、苜蓿素（2）、木犀草素7,4′-二甲醚（3）、槲皮素（4）、芫花素（5）、金圣草黄素（6）、原儿茶酸（7）、原儿茶酸甲酯（8）、对羟基苯甲醛（9）、赤杨酮（10）、赤杨醇（11）、olean-12-ene-3β,7β,15α,28-tetraol（12）、juglangenin A（13）、21β-dihydroxy-olean-12-ene（14）。结论化合物5和6为首次从金荞麦中分离得到,化合物12~14为首次从荞麦属植物中分离得到。

Objective To study the chemical constituents from the root tubers ofFagopyrum dibotrys. Methods The compounds were isolated and purified by means of chromatographic techniques and their structures were identified on the basis of spectral features. Results Fourteen known compounds were isolated from methanol extract in the dry roots of F. dibotrys and thier structures were identified as luteolin （1）, tricin （2）, luteolin-7,4＇-dimethyl ether （3）, quercetin （4）, genkwanin （5）, chrysoeriol （6）, protocatechuic acid （7）, protocatechuic acid methyl ester （8）, p-hydroxybenzaldehyde （o）, glutinone （10）, glutinol （11）, olean-12-ene-3β,7β,15α,28-tetraol （12）, juglangenin A （13）, and 21 β-dihydroxy-olean-12-ene （14）. Conclusion Compounds 5 and 6 are firstly obtained from F. dibotrys. Compounds 12--14 are isolated from the plants of Fagopyrum Mill. for the first time.