南葶苈子化学成分的分离与结构鉴定南葶苈子化学成分的分离与结构鉴定

目的研究南葶苈子的化学成分。方法用硅胶、聚酰胺-6、反相硅胶C₁₈和Sephadex LH 20柱色谱进行分离纯化。用MS,¹HNMR,13CNMR,HSQC,HMBC,TOCSY等波谱学方法,结合化学定性和薄层酸水解确定化合物结构。结果从南葶苈子中分离得到15个化合物,鉴定了12个化合物的结构,分别为:槲皮素-3-O-β-D-吡喃葡糖基-7-O-β-龙胆双糖苷(I);山萘酚-3-O-β-D-吡喃葡糖基-7-O-β-龙胆双糖苷(II);异鼠李素-3-O-β-D-吡喃葡糖基-7-O-β-龙胆双糖苷(III);槲皮素-7-O-β-龙胆双糖苷(IV);山萘酚-7-O-β-龙胆双糖苷(V);异鼠李素-7-O-β-龙胆双糖苷(VI);槲皮素-3,7-二-O-β-D-吡喃葡糖苷(VII);山萘酚-3,7-二-O-β-D-吡喃葡糖苷(VIII);异鼠李素-3,7-二-O-β-D-吡喃葡糖苷(IX);山萘酚-3-O-β-D-吡喃葡糖基-7-O-β-D-［2-芥子酰基-β-D-吡喃葡糖基(1→6)］-吡喃葡糖苷(X);芥子酸乙酯(XI);4-甲氧基芥子酸(XII)。结论X和VI是新化合物,IV,V,VII,VIII,IX均为首次自十字花科植物中分离得到,I,II,III均为首次自播娘蒿属中分离得到,XI和XII为首次自该植物中分离得到。

Isolation and structure identification of chemical constituents from the seeds of Descurainia sophia (L.) Webb ex Prantl

AIM: To isolate and determine the structures of chemical constituents from the seeds of Descurainia sophia (L.) Webb ex Prantl. METHODS: The chemical constituents were extracted from the seeds of Descurainia sophia (L.) Webb ex Prantl with 75% ethanol and purified by polyamide, silica gel, RP-C18 and Sephadex LH-20 on column chromatography. Chemical methods and spectroscopic methods, such as 1H and 13CNMR, HSQC, HMBC and TOCSY spectra were used for the structural identification. RESULTS: Fifteen compounds were obtained. Twelve of them were identified as quercetin-3-O-beta-D-glucopyranosyl-7-O-beta-gentiobioside (I), kaempferol-3-O-beta-D-glucopyranosyl-7-O-beta-gentiobioside (II), isorhamnetin-3-O-beta-D-glucopyranosyl-7-O-beta-gentiobioside (III), quercetin-7-O-beta-gentiobioside (IV), kaempferol-7-O-beta-gentiobioside (V), isorhamnetin-7-O-beta-gentiobioside (VI), quercetin-3,7-di-O-beta-D-glucopyranoside (VII), kaempferol-3, 7-di-O-beta-D-glucopyranoside (VIII), isorhamnetin-3, 7-di-O-beta-D-glucopyranoside (IX), kaempferol-3-O-beta-D-glucopyranosyl-7-O-(2-O-trans-sinnapoyl)-beta-D- glucopyranosyl(1-->6)]-beta-D-glucopyranoside) (X), sinapic acid ethyl ester (XI) and 3, 4, 5-trimethoxyl-cinnamic acid (XII). CONCLUSION: Compounds X and VI are new compounds. IV, V, VII, VIII and IX were isolated from Cruciferae family for the first time. I, II, III were obtained from Descurania genus and XI, XII from D. sophia for the first time.