Two new diacetylated flavonol glycosides, kampferol-3-O--3? 6?diacetylglucopyrano- side and quercetin-3-O--3? 6?diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectro...Two new diacetylated flavonol glycosides, kampferol-3-O--3? 6?diacetylglucopyrano- side and quercetin-3-O--3? 6?diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectroscopic evidents.展开更多
Two new flavonol glycosides (1 and 2) together with two known flavonoides (3 and 4), were isolated from the whole plant of Knoxia corymbosa willd. The structures of 1 and 2 were elucidated as kaempferol-7-O-α-L-arabi...Two new flavonol glycosides (1 and 2) together with two known flavonoides (3 and 4), were isolated from the whole plant of Knoxia corymbosa willd. The structures of 1 and 2 were elucidated as kaempferol-7-O-α-L-arabinosyl-3-O-β-D-6'-acetylglucopyranoside and kaempferol -7-O-α-L-arabinosyl-3-O-β-D-3',6'-diacetylglucopyranoside respectively.展开更多
目的 研究茜草科植物红芽大戟 (KnoxiacorymbosaWilld .)的化学成分。方法 利用硅胶、聚酰胺等色谱技术分离纯化 ,根据化合物的理化性质和光谱数据进行鉴定。结果 从红芽大戟的正丁醇萃取部分分离得到 4个黄酮醇苷成分 ,分别鉴定为 ...目的 研究茜草科植物红芽大戟 (KnoxiacorymbosaWilld .)的化学成分。方法 利用硅胶、聚酰胺等色谱技术分离纯化 ,根据化合物的理化性质和光谱数据进行鉴定。结果 从红芽大戟的正丁醇萃取部分分离得到 4个黄酮醇苷成分 ,分别鉴定为 :槲皮素 7 O α L 阿拉伯糖 3 O β D 6″ 乙酰基吡喃葡糖苷 (quercetin 7 O α L arabinosyl 3 O β D 6″ acetylglucopyranoside ,1 ) ;山奈酚 7 O α L 阿拉伯糖 3 O β D 吡喃葡糖苷 (kaempferol 7 O α L arabinosyl 3 O β D glucopyranoside ,2 ) ;槲皮素 3 O β D 吡喃葡糖苷 (quercetin 3 O β D glucopyranoside ,3) ;槲皮素 3 O β D 6″ 乙酰基吡喃葡糖苷 (quercetin 3 O β D 6″ acetylglucopyranoside,4 )。 结论 化合物 1为新化合物 。展开更多
文摘Two new diacetylated flavonol glycosides, kampferol-3-O--3? 6?diacetylglucopyrano- side and quercetin-3-O--3? 6?diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectroscopic evidents.
文摘Two new flavonol glycosides (1 and 2) together with two known flavonoides (3 and 4), were isolated from the whole plant of Knoxia corymbosa willd. The structures of 1 and 2 were elucidated as kaempferol-7-O-α-L-arabinosyl-3-O-β-D-6'-acetylglucopyranoside and kaempferol -7-O-α-L-arabinosyl-3-O-β-D-3',6'-diacetylglucopyranoside respectively.
文摘目的 研究茜草科植物红芽大戟 (KnoxiacorymbosaWilld .)的化学成分。方法 利用硅胶、聚酰胺等色谱技术分离纯化 ,根据化合物的理化性质和光谱数据进行鉴定。结果 从红芽大戟的正丁醇萃取部分分离得到 4个黄酮醇苷成分 ,分别鉴定为 :槲皮素 7 O α L 阿拉伯糖 3 O β D 6″ 乙酰基吡喃葡糖苷 (quercetin 7 O α L arabinosyl 3 O β D 6″ acetylglucopyranoside ,1 ) ;山奈酚 7 O α L 阿拉伯糖 3 O β D 吡喃葡糖苷 (kaempferol 7 O α L arabinosyl 3 O β D glucopyranoside ,2 ) ;槲皮素 3 O β D 吡喃葡糖苷 (quercetin 3 O β D glucopyranoside ,3) ;槲皮素 3 O β D 6″ 乙酰基吡喃葡糖苷 (quercetin 3 O β D 6″ acetylglucopyranoside,4 )。 结论 化合物 1为新化合物 。
