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从石竹科植物九子参(Silene rubicunda)根中得到四个糖链上带乙酰基的新的三萜皂苷-九子参苷A, B, C, D(rubicunosides A~D, 1~4)。前文已详细报道了九子参苷A的结构研究, 本文报道九子参苷B, C, D的结构。通过FAB-MS和NMR,分别确定九子参苷B, C, D为糖链上带单乙酰基的三萜九糖苷、七糖苷和糖链上带双乙酰基的三萜八糖苷, 分别命名为皂树酸-3-O-β-D-吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-β-D-吡喃葡萄糖醛酸-28-O-β-D-吡喃木糖-(1→3)-β-D-吡喃木糖-(1→4)-α-L-吡喃鼠李糖-(1→4)-[β-D-吡喃葡萄糖-(1→4')-β-D-吡喃鸡纳糖-(1→2)]-[3'-O-乙酰基]-β-D-吡喃夫糖苷(九子参苷B, 2), 皂树酸-3-O-β-D-吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-β-D-吡喃萄淘糖醛酸-28-O-β-D-吡喃木糖-(1→4)-α-L-吡喃鼠李糖-(1→4)-[4"-O-乙酰基-β-D-吡喃葡萄糖-(1→2)]-β-D-吡喃夫糖苷(九子参苷C, 3), 皂树酸-3-O-β-D-吡喃半乳糖-(1→2)-[β-D-吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-[6'-O-正丁基]-β-D-吡喃葡萄糖醛酸-28-O-β-D-吡喃木糖-(1→3)-β-D-吡喃木糖-(1→4)-α-L-吡喃鼠李糖-(1→4)-[2"-O-乙酰基-β-D-吡喃鸡纳糖-(3'-O-乙酰基]-β-D-吡喃夫糖苷(九子参苷D, 4)。 相似文献
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豆荚软珊瑚Lobophytum sp. 的次生代谢产物研究 总被引:4,自引:0,他引:4
从海南岛三亚海域采集的软珊瑚Labophytumsp.中分离得五个甾醇苷(1)~(5)。通过波谱分析,确定它们的化学结构依次为3'-O-乙酰基-4-O-[β-D-吡喃木糖苷]-孕甾-20-烯-3β,4α-二醇(1),4-O-[β-D-吡喃木糖苷]-孕甾-20-烯-3β,4α-二醇(2),4'-O-乙酰基-4-O-[β-D-吡喃木糖苷]-孕甾-20-烯-3β,4α-二醇(3),4'-O-乙酰基-4-O-[β-D-吡喃阿拉伯糖苷]-孕甾-20-烯-3β,4α-二醇(4)和4-O-[β-D-吡喃阿拉伯糖苷]-孕甾-20-烯-3β,4α-二醇(5),其中1为新化合物。体外细胞毒性实验表明:化合物(1),(2)和(5)对SKMG-4,Hep-G2和CNE2三种人体癌细胞具有抑制作用。 相似文献
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番红花化学成分研究 III. 番红花花粉中的番红花新苷甲和乙的结构 总被引:3,自引:0,他引:3
从番红花(crocus sativus L.)花粉中分到两个新苷, 命名为番红花新苷甲(1)和乙(2)。经理化性质和对它们的IR、UV、^1HNMR和MS数据的分析, 鉴定1为异鼠李素-4'-O-α-L-鼠李吡喃(1→2)β-D-葡萄吡喃糖苷, 2为β-对羟基苯基-乙醇-α-O-α-L-鼠李吡喃糖(1→2)-β-D-葡萄吡喃糖苷。 相似文献
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九子参苷A的结构 总被引:2,自引:0,他引:2
从石竹科植物九子参(Silene rubicunda Franch.)根中得到一个糖链上带双乙酰基的新三萜八糖苷──九子参苷A(rubicunoside A, 1)。以化学降解反应、酶解和波谱分析, 得到15个衍生物, 其结构最后确定为皂树酸-3-O-β-D-吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-β-D-吡喃葡萄糖醛酸-28-O-β-D-吡喃木糖-(1→3)-β-D-吡喃木糖-(1→4)-α-L-吡喃鼠李糖-(1→4)-[2'-O-乙酰基-β-D-吡喃鸡纳糖-(1→2)]-[3'-O-乙酰基]-β-D-吡喃夫糖苷{3-O-β-D-galactopyranosyl-(1→2)-[→β-D-xylopyranosyl-(1→3)]-β-D-glucuronopyranosyl quillaic acid 28-O-β-D-xylopyranosyl-(1→3)-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(→4)-[2'-OAc-→β-D-quinovopyranosyl-(1→2)]-[3'-OAc]-β-D-fucopyranoside, 1}。同时发现甘草酸酶的两个新酶解特性。。 相似文献
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从西藏胡黄连中分离和鉴定了4个化合物,其中化合物1是新化合物,命名为西藏胡黄连酚苷E(Scrophenoside E),结构为(2-甲氧基-4-乙酰基)苯酚-3-β-D-吡喃葡萄糖基-6-O-(4-β-D-吡喃葡萄糖基)香草酰基-β-D-吡喃葡萄糖苷. 相似文献
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从番红花(crocus sativus L.)花粉中分到两个新苷, 命名为番红花新苷甲(1)和乙(2)。经理化性质和对它们的IR、UV、^1HNMR和MS数据的分析, 鉴定1为异鼠李素-4'-O-α-L-鼠李吡喃(1→2)β-D-葡萄吡喃糖苷, 2为β-对羟基苯基-乙醇-α-O-α-L-鼠李吡喃糖(1→2)-β-D-葡萄吡喃糖苷。 相似文献
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从石竹科植物九子参(Silene rubicunda)根中得到四个糖链上带乙酰基的新的三萜皂苷——九子参苷A,B,C,D(rubicunosides A~D,1~4).前文已详细报道了九子参苷A的结构研究,本文报道九子参苷B,C,D的结构.通过FAB-MS和NMR,分别确定九子参苷B,C,D为糖链上带单乙酰基的三萜九糖苷、七糖苷和糖链上带双乙酰基的三萜八糖苷,分别命名为皂树酸-3-O-β-D吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-β-D-吡喃葡萄糖醛酸-28-O-β-D-吡喃木糖-(1→3)-β-D-吡喃木糖-(1→4)-a-L-吡喃鼠李糖-(1→4)-[β-D-吡喃葡萄糖-(1→4′)-β-D-吡喃鸡纳糖-(1→2)]-[3′-O-乙酰基]-β-D-吡喃夫糖苷(九子参苷B,2),皂树酸-3-O-β-D-吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-β-D-吡喃葡萄糖醛酸-28-O-β-D-吡喃木糖-(1→4)-a-L-吡喃鼠李糖-(1→4)-[4″-O-乙酰基-β-D-吡喃葡萄糖-(1→2)]-β-D-吡喃夫糖苷(九子参苷C,3),皂树酸-3-O-β-D-吡喃半乳糖-(1→2)-[β-D-吡喃木糖-(1→3)]-[6′-O-正丁基]-β-D-吡喃葡萄糖醛酸-28-O-β-D-吡喃木糖-(1→3)-β-D-吡喃木糖-(1→4)-a-L-吡喃鼠李糖-(1→4)-[2″-O-乙酰基-β-D-吡喃鸡纳糖-(1→2)]-[3′-O 乙酰基]-β-D-吡喃夫糖苷(九子参苷D,4). 相似文献
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A cyclolanostene-type triterpene and two saponins derived thereform, namely MP-C, D and F, were isolated from the acid-hydrolyzate of the mixture ofsaponins of Mussaenda pubesecus.Their structures were elucidated on the basis of chemical and UV, IR, 1H, 13C NMR and MS spectral evidence.The two newsaponins MP-D and F were named Mussaendoside A and C, respectively. 相似文献
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中国乌头的研究:XXIII, 紫草乌生物碱的研究 总被引:2,自引:0,他引:2
从云南紫草乌(Aconitum delavayi Franch)中又分得四个生物碱, 其中三个为新的二萜类生物碱, 分别命为紫草乌碱丙(delavaconitine C,3),紫草乌碱丁(delavaconitine D,5)和紫草乌碱戊(delavaconitime E,6),经乙酰 化、水解及UV、IR、MS、^1H和^1^3CNMR 的测定, 确定了它们的化学结构。另一个经鉴定为紫草乌碱甲胺醇(delavaconine, 2), 首次从植物中分离得到。 相似文献
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Qiao X Zhang X Ye M Su YF Dong J Han J Yin J Guo DA 《Rapid communications in mass spectrometry : RCM》2010,24(22):3340-3350
Conyza blinii Le'vl is a medicinal herb used for the treatment of inflammation in Chinese folk medicine. Its major bioactive constituents are triterpene saponins, most of which contain 6–8 sugar residues. In this report, electrospray ionization tandem mass spectrometry fragmentation behaviors of bisdesmosidic triterpene saponins (conyzasaponin A, B, and C) were studied in both positive and negative ion modes with an ion‐trap mass spectrometer. In full scan mass spectrometry, these saponins gave predominant [M–H]? and [M+Na]+ ions, which determined the molecular weights. In tandem mass spectrometry (MSn, n = 2–4), the [M–H]? and [M+Na]+ ions yielded fragments [Y0α–H]? and [Bα+Na]+, which were diagnostic for the structures of the triterpene skeleton and sugar chains. The structural elucidation was approved by accurate mass data using IT‐TOF‐MS. An interpretation guideline based on MSn (n = 2–4) diagnostic ions was proposed in order to elucidate the chemical structures of unknown triterpene saponins in C. blinii extract. The saponins in C. blinii were separated by liquid chromatography with a methanol/acetonitrile/water solvent system, and then analyzed by ion‐trap and IT‐TOF mass spectrometers. Based on the interpretation guideline, a total of 35 triterpenoid saponins were tentatively identified. Among them, 15 saponins had been previously reported, and the other 20 saponins were reported from Conyza species for the first time. This study indicates that LC/MS is a powerful technology for the rapid characterization of complicated saponins in herbal extracts. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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Eight cucurbitane-type triterpene glycosides called goyaglycosides-a, -b, -c, -d, -e, -f, -g, and -h and three oleanane-type triterpene saponins termed goyasaponins I, II, and III were isolated from the fresh fruit of Japanese Momordica charantia L. (Cucurbitaceae) together with five known cucurbitane-type triterpene glycosides momordicosides A, C, F1, I, and K. The structures of goyaglycosides and goyasaponins were elucidated on the basis of chemical and physicochemical evidence. 相似文献
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Abdou Tchoukoua Ingrid Konga Simo Shota Uesugi Misa Ohno Ken-ichi Kimura 《Natural product research》2018,32(8):924-932
Two new triterpene saponins, albidosides H (1) and I (2), along with the three known saponins were isolated from the barks of Acacia albida. Their structures were elucidated on the basis of extensive 1D- and 2D-NMR studies and mass spectrometry. Albidosides H (1) and I (2) were assayed for their cytotoxicity against HeLa and HL60 cells using MTT method. 相似文献
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氯苯硝化副产物的研究: 氯代三硝基二苯胺的分离与结构 总被引:1,自引:0,他引:1
从氯苯硝化母液中用薄层色谱分离到二个新的氯代三硝基二苯胺.用UV,IR,NMR,MS和一些物理化学数据的测定推导出它们的结构为4-氯-2',3',6'-三硝基二苯胺和4-氯-2',3',4'-三硝基二苯胺. 相似文献