瘤果黑种草子的化学成分

目的研究中药瘤果黑种草子的化学成分。方法运用多种色谱方法分离化学成分;依据这些化学成分的理化性质和波谱(NMR、EI-MS)数据分析鉴定化合物的结构。结果从瘤果黑种草子中初步分离得到5个化合物,分别鉴定为胡萝卜苷(1)、常春藤皂苷元-3-O-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖苷(2)、常春藤皂苷元-3-O-β-D-吡喃木糖基-(1→3)-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖苷(3)、3-O-β-D-吡喃木糖基-(1→3)-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖常春藤皂苷元-28-O-β-D-吡喃葡萄糖酯苷(4)、山奈酚-3-O-β-D-吡喃葡萄糖基-(1→2)-β-D-吡喃半乳糖基-(1→2)-β-D-吡喃葡萄糖苷(5)。结论化合物4为首次从黑种草属植物中分离得到,化合物5为首次从该种植物中分离得到。     

长药隔重楼中甾体皂苷成分的分离与结构鉴定

目的 研究长药隔重楼Paris polyphylla Smith varh.pseudothibetica的化学成分.方法 采用硅胶柱层析、大孔吸附树脂、葡聚糖凝胶Sephadex LH-20、预装硅胶中压柱层析及半制备RP-HPLC等技术分离纯化单体化合物,根据理化性质及波谱数据鉴定其结构.结果 从长药隔重楼乙醇提取物中分离并鉴定了8个甾体皂苷类单体化合物,分别是偏诺皂苷元-3-O-β-D-葡萄吡喃糖苷(Ⅰ)、薯蓣皂苷元-3-O-а-L-阿拉伯呋喃糖基(1→4)-[а-L-鼠李吡喃糖基(1→2)]-B-D-葡萄吡喃糖苷(Ⅱ)、薯蓣皂苷元-3-O-а-D-葡萄吡喃糖基(1→)-[а-L-鼠李吡喃糖基(1→2)]-β-D-葡萄吡喃糖苷(Ⅲ)、偏诺皂苷元-3-а-L-鼠李吡喃糖基(1→2)-B-D-葡萄吡喃糖苷(Ⅳ)、偏诺皂苷元-3-O-а-L-阿拉伯呋喃糖基(1→4)-[а-L-鼠李吡喃糖基(1→2)]-β-D-葡萄吡喃糖苷(Ⅴ)、偏诺皂苷元-3-O-а-L-鼠李吡喃糖基(1→4)-a-L一鼠李吡喃糖基(1→4)-[а-L-鼠李吡喃糖基(1→2)]-β-D-葡萄吡喃糖苷(Ⅵ)、偏诺皂苷元-3-D-β-L-鼠李吡喃糖基(1→4)-[a-L-鼠李吡喃糖基(1→2)]-β-D-葡萄吡喃糖苷(Ⅶ)、偏诺皂苷元-3-O-β-D-木呋喃糖基(1→5)-а-L-阿拉伯呋喃糖基(1→4)-[а-L-鼠李吡喃糖基(1→2)]-β-D-葡萄吡喃糖苷(Ⅷ).结论 首次从长药隔重楼中分离并鉴定出化合物Ⅰ～Ⅷ.     

丫蕊花的化学成分

从百合科丫蕊花属植物丫蕊花(Ypsilandra thibetica Franch)全草中分离鉴定了8个化合物,分别为:偏诺皂苷元(1),偏诺皂苷元-3-O-α-L-呋喃阿拉伯糖基(1→4)-[α-L-吡喃鼠李糖基(1→2)]-β-D-吡喃葡萄糖苷(2),偏诺皂苷元-3-O-α-L-吡喃鼠李糖基(1→4)-[α-L-吡喃鼠李糖基(1→2)]-β-D-吡喃葡萄糖苷(3),偏诺皂苷元-3-O-α-L-吡喃葡萄糖(1→4)-α-L-吡喃鼠李糖(1→4)-[α-L-吡喃鼠李糖(1→2)]-β-D-吡喃葡萄糖苷(4),薯蓣皂苷元(5),薯蓣皂苷元-3-O-α-L-吡喃鼠李糖基(1→4)-[α-L-吡喃鼠李糖基(1→2)]-β-D-吡喃葡萄糖苷(6),木犀草素(7),木犀草苷(8)。其中化合物1,2,5,7,8均首次在丫蕊花植物中分到。     

灯台七化学成分及抗癌活性研究

目的研究灯台七化学成分及抗癌活性。方法采用硅胶柱色谱、Sephadex LH-20凝胶柱色谱、半制备高效液相色谱等方法分离纯化,理化性质及现代波谱技术鉴定其结构。通过MTT法评价化合物4~8的抗癌活性。结果共分离鉴定了8个化合物,分别为β-蜕皮激素(1)、pinnatasterone(2)、豆甾醇(3)、豆甾醇-3-O-β-D-吡喃葡萄糖苷(4)、偏诺皂苷元3-O-α-L-鼠李吡喃糖(l→2)[α-L-阿拉伯呋喃糖(1→4)]-β-D-葡萄吡喃糖苷(5)、偏诺皂苷元-3-O-α-L-鼠李吡喃糖(l→4)α-L-鼠李吡喃糖(1→4)-[α-L-鼠李吡喃糖(l→2)]-β-D葡萄吡喃糖苷(6)、偏诺皂苷元-3-O-α-L-鼠李吡喃糖(l→4)-[α-L-鼠李吡喃糖基(1→2)]-β-D-葡萄糖苷(7)、偏诺皂苷元-3-O-α-L-鼠李吡喃糖基(l→4)-[α-L-鼠李吡喃糖基(1→4)]-β-D-葡萄糖苷(8)。化合物5~8对结肠癌SW620和HT-29细胞有显著的抑制作用。结论化合物5~8均表现出很强的细胞毒活性。     

长药隔重楼的化学成分研究

目的 研究长药隔重楼的化学成分.方法 采用柱色谱方法单分离纯化单体化合物,通过波谱学方法鉴定其结构.结果 分离并鉴定了5个化合物,分别是△5,22-豆甾醇3-O-β-D-葡萄吡喃糖苷(I),20β-羟基蜕皮激素(Ⅱ),B-L-脱氧胸腺嘧啶苷(Ⅲ),偏诺皂苷元3-O-α-L-鼠李吡喃糖基-(1→2)-p-D-葡萄吡喃糖苷(Ⅳ)和偏诺皂苷元3-O-α-L-鼠李吡喃糖基-(1→4)-α-L-鼠李吡喃糖基-(1→4)-[α-L-鼠李吡喃糖基-(1→2)-]-β-D-葡萄吡喃糖苷(Ⅴ).结论 所有化合物均为首次从该植物中得到;其中化合物Ⅲ为首次从该属植物中分离得到.     

黄花败酱中三萜皂苷类成分的分离鉴定

目的 研究黄花败酱中的化学成分.方法 将黄花败酱全草的乙醇提取物经大孔树脂、硅胶、ODS柱分离得到6个化合物,通过(1H、13CNMR、ESI-MS等分析和化学方法进行结构鉴定.结果 6个化合物分别被鉴定为3-O-β-D-吡喃木糖-(1→3)-α-L-吡喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖-常春藤皂苷元-28-O-β-D-吡喃葡萄糖(6→1)-β-D-吡喃葡萄糖-(4→1)-α-L-吡喃鼠李糖酯苷(Ⅰ)、3-O-β-D-α-L-吡喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖-常春藤皂苷元-28-O-β-D-吡喃葡萄糖(6→1)-β-D-吡喃葡萄糖-(4→1)-α-L-吡喃鼠李糖酯苷 (Ⅱ)、齐墩果酸-3-α-L-吡喃阿拉伯糖-(2→1)-α-L-吡喃鼠李糖-(3→1)-O-β-D-吡喃木糖苷(Ⅲ)、3-O-β-D-吡喃木糖-(1→3)-α-L-吡喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖-齐墩果酸-28-O-β-D-吡喃葡萄糖酯苷 (Ⅳ)、齐墩果酸-3-O-β-D-吡喃木糖-(2→1)-α-L-吡喃鼠李糖苷(Ⅴ)、常春藤皂苷元-3-O-α-L-吡喃阿拉伯糖-(2→1)-α-L-吡喃鼠李糖苷 (Ⅵ).结论 化合物Ⅳ为一个新的天然产物,化合物Ⅰ和Ⅲ为首次从该植物中分离得到.     

延龄草化学成分的分离与鉴定

目的研究延龄草(Trillium tschonoskii Maxim.)根及根茎的化学成分。方法利用硅胶柱色谱、凝胶柱色谱、ODS(反相C18键合硅胶)柱色谱、高效液相色谱等色谱技术对延龄草的化学成分进行分离和纯化,通过理化性质和NMR等波谱数据分析确定化合物的结构。结果从延龄草根及根茎70%(φ)乙醇提取物中分离得到11个已知成分,分别确定为重楼皂苷Ⅵ(chonglouosideⅥ,1)、偏诺皂苷元-3β-O-α-L-吡喃鼠李糖基-(1→4)-[O-α-L-吡喃鼠李糖基-(1→2)]-O-β-D-吡喃葡萄糖苷(penogenin-3β-O-α-L-rhamnopyranosyl-(1→4)-[O-α-L-rhamnopyranosyl-(1→2)]-O-β-D-glu-copyranoside,2)、重楼皂苷Ⅶ(chonglouosideⅦ,3)、偏诺皂苷元-3β-O-β-D-吡喃葡萄糖基-(1→6)-[O-α-L-吡喃鼠李糖基-(1→2)]-O-β-D-吡喃葡萄糖苷(trikamsteroside B,4)、(25S)-27-羟基偏诺皂苷元-3β-O-α-L-吡喃鼠李糖基-(1→2)-O-β-D-吡喃葡萄糖苷((25S)-27-hydroxypenogenin-3β-O-α-L-rhamnopyranosyl-(1→2)-O-β-D-glucopyranoside,5)、(25S)-27-羟基偏诺皂苷元-3β-O-α-L-吡喃鼠李糖基-(1→4)-[O-α-L-吡喃鼠李糖基-(1→2)]-O-β-D-吡喃葡萄糖苷((25S)-27-hydroxypenogenin-3β-O-α-L-rhamnopyranosyl-(1→4)-[O-α-L-rhamnopyranosyl-(1→2)]-O-β-D-glucopyranoside,6)、(25S)-27-羟基偏诺皂苷元-3β-O-α-L-吡喃鼠李糖基-(1→4)-O-α-L-吡喃鼠李糖基-(1→4)-[O-α-L-吡喃鼠李糖基-(1→2)]-O-β-D-吡喃葡萄糖苷(polyphyllosideⅢ,7)、(23S,24S,25S)-螺甾-5-烯-1β,3β,21,23,24-五羟基-1β-O-β-D-呋喃芹糖基-(1→3)-O-α-L-吡喃鼠李糖基-(1→2)-[O-β-D-吡喃木糖基-(1→3)]-O-α-L-吡喃阿拉伯糖苷(trikamsteroside E,8)、3β-O-α-L-rhamnopyranosyl-(1→2)-O-β-D-glucopyranosylhomo-aro-cholest-5-ene-26-O-β-D-glucopyranoside(parispseudoside B,9)、3β-O-α-L-rhamnopyranosyl-(1→4)-[O-α-L-rhamnopyranosyl-(1→2)]-O-β-D-glucopyranosylhomo-aro-cholest-5-ene-26-O-β-D-glucopyranoside(aethioside A,10)、3β-O-α-L-rhamnopyranosyl-(1→4)-O-α-L-rham-nopyranosyl-(1→4)-[O-α-L-rhamnopyranosyl-(1→2)]-O-β-D-glucopyranosylhomo-aro-cholest-5-ene-26-O-β-D-glucopyranoside(parispseudoside A,11)。结论化合物9-11为首次从百合科植物中分离得到,7为首次从延龄草属植物中分离得到,4-6、8为首次从延龄草中分离得到。     

东北铁线莲三萜皂苷对照品的制备

目的:制备一种用于东北铁线莲含量测定的三萜皂苷对照品。方法:采用大孔吸附树脂柱色谱和制备液相色谱进行分离,质谱和核磁共振波谱数据鉴定结构,高效液相色谱-蒸发光散射检测法测定纯度。结果:制备了符合含量测定用要求的三萜皂苷对照品3-O-α-L-吡喃鼠李糖基-(1→6)-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃核糖基-(1→3)-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖基齐墩果酸28-O-α-L-吡喃鼠李糖基-(1→4)-β-D-吡喃葡萄糖基-(1→6)-β-D-吡喃葡萄糖苷。结论:本试验结果可为东北铁线莲质量评价提供物质基础。     

薯蓣属植物化学成分的研究——Ⅱ.叉蕊薯蓣中甾体皂甙的分离和鉴定

从叉蕊薯蓣(D.collettii HooK.f.)根茎的乙醇提取物分离到四个甾体皂甙,根据理化性质、光谱数据,推定化学结构为3-O-(β-D-葡萄吡喃糖)-约莫皂甙元(3-O-(β-D-glucopyranosyl)-yamogenin)[Ⅰ];3-O-[α-L-鼠李吡喃糖(1→4)-β-D-葡萄吡喃糖]-约莫皂甙元(3-O-[α-L-rahmnopyranosyl(1→4)-β-D-glucopyranosyl]-yamogenin)[Ⅱ];3-O-{α-L-鼠李吡喃糖(1→4)-[α-L-鼠李吡喃糖(1→2)]-β-D-葡萄吡喃糖}-约莫皂甙元(3-O-{α-L-rhamnopyranosyl(1→4)-[α-L-rhamnopyranosyl(1→2)]-β-D-glucopranosyl}-yamogenin)[Ⅲ];3-O-{β-D-葡萄吡喃糖(1→3)-[α-L-鼠李吡喃糖(1→2)3-β-D-葡萄吡喃糖}-约莫皂甙元(3-O-{β-D-glucopyranosyl(1→3)-[α-L-rhamnopyranosyl(1→2)]-β-D-glucopyranosyl}-yamogenin)[Ⅳ]。其中Ⅰ为已知物,Ⅱ、Ⅲ、Ⅳ为首次从植物界得到的新甾体皂甙。     

具有抗炎活性的双三糖链呋甾皂苷的合成

目的设计合成两个甲基原薯蓣皂苷的衍生物，分别为3，26-O-二{α-L-吡喃鼠李糖基-（1→2）-[α-L-吡喃鼠李糖基-（1→4）]-3，6-O-二特戊酰基-β-D-吡喃葡萄糖基}-22-甲氧基-25（R）-呋甾-5-烯-3β，26-二醇（1）和3，26-O-二{α—L-吡喃鼠李糖基-（1→2）-[a—L-吡喃鼠李糖基-（1→4）]-β-D-吡喃葡萄糖基}-22-甲氧基-25（R）-呋甾-5-烯-3β，26-二醇（2）。方法以薯蓣皂素为起始原料，采用逐步糖苷化策略，经10步反应制得目标化合物，总收率约为15％。结果与结论合成的两个双三糖链呋甾皂苷均为未见文献报道的新化合物．其结构经ESI-MS和^13C-NMR确证，初步生物活性筛选结果表明化合物1具有一定的抗炎活性。     

Saponins from the stem bark ofKalopanax pictum var.magnificum (I)

Three triterpenoid saponins were isolated from the methanol extract of the stem bark ofKalopanax pictum Nakai var.magnificum (Araliaceae). The structures of these saponins were identified as hederagenin 3-O-α-L-arabinopyranoside, hederagenin-3-O-α-L-rhamnopyranosyl(1→2)-α-L-arabinopyranoside and 3-O-α-L-rhamnopyranosyl(1→2)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl(1→4)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester.     

Saponins from the roots ofPulsatilla koreana

From the roots ofPulsatilla koreana, three monodesmosides(pulsatilla saponins A, B and D) and two bisdesmosides(pulsatilla saponins F and H) were isolated. The structure of these saponins have been determined as hederagenin 3-O-α-L-rhamnopyranosyl(1→2)-α-L-arabinopyranoside(A), hederagenin 3-O-β-D-glucopyranosyl(1→4)-α-L-arabinopyranoside(B), hederagenin 3-O-α-L-rhamnopyranosyl (1→2)-[β-D-glucopyranosyl(1→4)]-α-L-arabinopyranoside(D), 3-O-α-L-rhamnopyranosyl(1→2)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl(1→4)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester (F) and 3-O-α-L-rhamnopyranosyl(1→2)-[β-D-glucopyranosyl(1→4)]-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl(1→4)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester(H) on the basis of chemical and spectral studies. Pulsatilla saponin B is the first report of its presence in plants but saponins A, D, F, and H have recently been isolated from the same genusP. cernua.     

Two new oleanane-type pentacyclic triterpenoid saponins from the husks of Xanthoceras sorbifolia Bunge

Two new triterpenoid saponins (1, 2) and a known saponin (3) were isolated from the husks of Xanthoceras sorbifolia Bunge., and their structures were elucidated as 3-O-β-D-glucopyranosyl(1 → 6)-[angeloyl(1 → 2)]-β-D-glucopyranosyl-28-O-α-L-rhamnopyranosyl(1 → 2)-[β-D-glucopyranosyl(1 → 6)]-β-D-glucopyranosyl-21β,22α-dihydroxyl-olean-12-ene (1), 3-O-β-D-glucopyranosyl-28-O-[β-D-glucopyranosyl(1 → 2)]-β-D-glucopyranosyl-21β,22α-dihydroxyl-olean-12-ene (2), and 3-O-β-D-glucopyranosyl-28-O-[α-L-rhamnopyranosyl(1 → 2)]-β-D-glucopyranosyl-21β,22α-dihydroxyl-olean-12-ene (3), on the basis of the spectral analysis of NMR and chemical methods. Cytotoxic assay indicated that none of them showed obvious inhibitory effect on the proliferation of two human tumor cell lines.     

Two new triterpenoid saponins from the leaves of Ilex kudingcha

Two new triterpene saponins, ilekudinchosides F (1) and G (2), along with three known saponins were isolated from the leaves of Ilex kudingcha C. J. Tseng. The new compounds were characterized as 3β,19α-dihydroxy-12α-ethoxy-urs-13(18)-ene-28,20β-lactone-3-O-[β-D-glucopyranosyl(1 → 3)]-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (1) and 3β,19α-dihydroxy-12α-methoxy-urs-13(18)-ene-28,20β-lactone-3-O-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (2). The new structures were elucidated by spectroscopic methods including 1D and 2D NMR, HR-TOF-MS, and CD spectrometry, and the known compounds were identified by the comparison of their NMR and HR-TOF-MS data with those reported in the literature.     

Three triterpenoid saponins acylated with monoterpenic acid from Gymnocladus chinensis

A new triterpenoid saponin acylated with monoterpenic acid, together with two known triterpenoid saponins, has been isolated from the fruit of Gymnocladus chinensis Baill. Their structures were elucidated as 2β,23-dihydroxy-3-O-α-L-rhamnopyranosyl-21-O-{(6S)-2-trans-2,6-dimethyl-6-O-[3-O-(β-D-glucopyranosyl)-4-O-((6S)-2-trans-2,6-dimethyl-6-hydroxy-2,7-octadienoyl)-β-L-arabinopyranosyl]-2,7-octadienoyl}-acacic acid 28-O-β-D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 → 4)-α-L-rhamnopyranosyl-(1 → 2)-[α-L-rhamnopyranosyl-(1 → 6)]-β-D-glucopyranosyl ester (1), gymnocladus saponin E (2), and gymnocladus saponin F(2) (3).     

黑种草子化学成分研究

从民族药黑种草子(Semen nigellae)中分离得到七个化合物,其中两个为新化合物,分别命名为黑种草甙(nigeglanoside)和黑种草糖(nigelancae)。经理化常数测定和光谱解析确定其结构分别为山萘酚-3-O-β-D-吡喃半乳糖基(1→3)-β-D-吡喃葡萄糖基(1→3)-β-D-吡喃葡萄糖甙和2-O-α-D-吡喃半乳糖基(1→4)-β-D-吡喃葡萄糖基-β-D-呋喃果糖甙。另外五个已知化合物分别为附子碱的氯化物(fuzitinechloride)、常春藤皂甙、蔗糖(sucrose)、β-谷甾醇(β-sitosterol)和环劳顿醇(cyclolandenol)。     

Metabolite profiling of the leaves of the Brazilian folk medicine Sideroxylon obtusifolium

Sideroxylon obtusifolium (Roem. & Schult.) T. D. Penn. (family Sapotaceae) is a tree native to Central and South America. Infusions of the bark and the leaves are used in Brazilian folk medicine as an anti-inflammatory remedy. However, information on the constituents of S. obtusifolium remains scarce, and only common pentacyclic triterpenoids have been previously reported. HPLC-DAD/MS analyses revealed that saponins and flavonoids were the main constituents of the leaves. From the butanol-soluble fraction of an ethanolic extract, a total of four saponins and ten flavonol glycosides were isolated by a combination of chromatographic methods including Sephadex LH-20, MPLC, and HPLC. Their structures were established by acid hydrolysis and spectroscopic methods, mainly MS (n), 1D and 2D NMR experiments. The compounds include the new triterpene glycoside 3-O-( β-D-glucopyranosyl)-protobassic acid 28-O- β-D-apiofuranosyl-(1 → 3)-O-[O- β-D-apiofuranosyl-(1 → 3)- β-D-xylopyranosyl-(1 → 4)]-O- α-L-rhamnopyranosyl-(1 → 2)- α-L-arabinopyranosyl ester ( 1), as well as the new flavonol glycosides, quercetin-3-O-(O- α-L-rhamnopyranosyl-(1→ 2)-O-[ β-D-glucopyranosyl-(1 → 3)]- β-D-galactopyranoside) ( 6) and kaempferol-3-O-(O- α-L-rhamnopyranosyl-(1 → 2)-O-[ β-D-glucopyranosyl-(1 → 3)]- β-D-galactopyranoside) ( 8). In addition, catechin and a glycerogalactolipid, gingerglycolipid A, were obtained from the ethyl acetate-soluble fraction. The isolated compounds could be used in the future as chemical markers for quality control of this herbal drug.     

薯蓣属植物化学成分的研究——Ⅱ.叉蕊薯蓣中甾体皂甙的分离和鉴定

从叉蕊薯蓣(D.collettii HooK.f.)根茎的乙醇提取物分离到四个甾体皂甙,根据理化性质、光谱数据,推定化学结构为3-O-(β-D-葡萄吡喃糖)-约莫皂甙元(3-O-(β-D-glucopyranosyl)-yamogenin)[Ⅰ];3-O-[α-L-鼠李吡喃糖(1→4)-β-D-葡萄吡喃糖]-约莫皂甙元(3-O-[α-L-rahmnopyranosyl(1→4)-β-D-glucopyranosyl]-yamogenin)[Ⅱ];3-O-{α-L-鼠李吡喃糖(1→4)-[α-L-鼠李吡喃糖(1→2)]-β-D-葡萄吡喃糖}-约莫皂甙元(3-O-{α-L-rhamnopyranosyl(1→4)-[α-L-rhamnopyranosyl(1→2)]-β-D-glucopranosyl}-yamogenin)[Ⅲ];3-O-{β-D-葡萄吡喃糖(1→3)-[α-L-鼠李吡喃糖(1→2)3-β-D-葡萄吡喃糖}-约莫皂甙元(3-O-{β-D-glucopyranosyl(1→3)-[α-L-rhamnopyranosyl(1→2)]-β-D-glucopyranosyl}-yamogenin)[Ⅳ]。其中Ⅰ为已知物,Ⅱ、Ⅲ、Ⅳ为首次从植物界得到的新甾体皂甙。     

Two new flavone glycosides from the seeds of Impatiens balsamina L

Two new flavone glycosides were isolated from the seeds of Impatiens balsamina L. and their structures were determined as quercetin-3-O-[α-L-rhamnose-(1 → 2)-β-d-glucopyranosyl]-5-O-β-D-glucopyranoside (1), and quercetin-3-O-[(6'-O-caffeoyl)-α-L-rhamnose-(1 → 2)-β-D-glucopyranosyl]-5-O-β-D-glucopyranoside (2) on the basis of various spectral and chemical studies.