Triterpenoid saponins from Symplocos lancifolia

Three new bidesmosidic saponins (1-3) and a new ursane triterpenoid, 2α,3β,11α,23-tetrahydroxyurs-12-en-28-oic acid (4), along with seven known compounds, were isolated from a methanolic extract of the leaves of Symplocos lancifolia. The bidesmosidic saponins were found to possess the same sugar unit part, composed of two β-d-glucose moieties and one α-l-rhamnose moiety, linked to maslinic acid, arjunolic acid, and asiatic acid, respectively. Their structures were elucidated by interpretation of their 1D and 2D NMR spectra and completed by analysis of the HRESIMS data. The antibacterial activity of the isolated triterpenoids was evaluated against Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, and Pseudomonas aeruginosa, and several showed activity against Gram-positive bacteria.     

Triterpenoid saponins from Patrinia scabra简

AIM： To study the chemical constituents and bioactivity of the roots ofPatrinia scabra Bunge. METHODS： The chemical constituents were isolated using various chromatographic methods, and the structures were elucidated on the basis of spectral analysis and chemical methods. In addition, cytotoxic activities toward HepG2 cells were tested by the MTT method. RESULTS： A new triterpenoid saponin, 3-O-（4＇-isovaleryl）-O-β-D-xylose-12,30-dihydroxy-oleanane-28,13-1actone-22-O- β-D-glucoside （1）, along with two known triterpenoid saponins, acanthopanax saponin CP3 （2） and foetoside C （3）, were isolated. CONCLUSION： The aglycone of compound 1 was a new skeleton derivative of oleanolic acid. Compound 2 showed strong cyto- toxicity to HePG2 cells （IC50 1.49 umol.L-1）.     

Triterpenoid saponins from Campsiandra guayanensis

Thirteen new triterpenoid saponins (1-13) were isolated from the aerial parts of Campsiandra guayanensis. Their structures were elucidated by 1D and 2D NMR experiments including 1D-TOCSY, DQF-COSY, ROESY, HSQC, and HMBC spectroscopy, as well as ESIMS analysis. The aglycon moieties of 1-10 were assigned as oleanane derivatives and those of 11-13 as lupane derivatives.     

Triterpenoid saponins from Isertia pittieri.

Two new 27-nor-triterpenoid saponins, pyrocincholic acid 3 beta-O-beta-D-quinovopyranosyl-28-[beta-D-glucopyranosyl(1-->6)-beta-D-glucopyranosyl] ester (1) and pyrocincholic acid 3 beta-O-beta-D-quinovopyranosyl(1-->6)-beta-D-glucopyranosyl-28-[beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl] ester (2) were isolated from the stem bark of Isertia pittieri, together with two known bidesmosidic quinovic acid glycosides. The structures of 1 and 2 were determined on the basis of spectroscopic studies.     

Triterpenoid saponins from Ilex kudincha.

Ten new triterpene saponins, ilekudinosides A-J (2, 6-8, 10, 13-17), together with seven known triterpene saponins, ilexoside XLVIII (1); cynarasaponin C (5); latifolosides A (9), C (3), G (12), and H (4); and kudinoside G (11), were isolated from an aqueous extract of the leaves of Ilex kudincha. They possessed oleanane- and ursane-type triterpenoids as the aglycons. The structures were elucidated by 1D and 2D NMR experiments, including ROE difference, HOHAHA difference, 1H-1H COSY, and 1H-13C COSY (HMQC, HMBC) methods and sugar analysis. Compounds 1 and 5 exhibited acyl CoA cholesteryl acyl transferase (ACAT) inhibitory activity.     

Triterpenoid saponins from the fruits of Caryocar glabrum

Twenty-one new triterpenoid saponins, named caryocarosides (1-21), glycosides of 2beta-hydroxyoleanolic acid, hederagenin, bayogenin, and gypsogenic acid, have been isolated from the fruits of Caryocar glabrum along with nine known triterpenoid saponins (22-30) that are described for the first time from a plant in the Caryocaraceae. Their structures were established by 1D and 2D NMR techniques ((13)C, COSY, TOCSY, HSQC, HMBC, and ROESY experiments), ESIMS, and acid hydrolysis. The isolated compounds could be classified into two series: glucosides (1-8, 22, 27, and 30) derived from the 3-O-monoglucoside and glucuronides (9-21, 23-26, 28, and 29) derived from the 3-O-monoglucuronide. In 22 of the saponins (1-8, 12-22, and 24-26), a galactose moiety was linked to C-3 of a glucuronic acid or a glucose moiety. The galactose was substituted in position 3 by a second galactose unit (6, 7, 20, and 21) or by a xylose unit (8). Seven saponins (4, 5, 16-19, and 26) were found to be bidesmosides with one glucose unit linked to C-28 of the aglycon. The hemolytic activity of the major saponins (2, 3, 5, 12-15, 17, 24, and 28) was measured on sheep erythrocytes in order to establish structure-activity relationships based on the type of sugar attached to the aglycon and on the structure of this aglycon.     

Triterpenoid saponins from the fruits of Caryocar villosum

Fourteen new triterpenoid saponins (1-14) were isolated from the methanol extract of the fruits of Caryocar villosum along with 10 known saponins. Their structures were established on the basis of extensive NMR (1H, 13C, COSY, TOCSY, ROESY, HSQC, and HMBC) and ESIMS studies. The toxicity of the methanolic extracts of the peel and the pulp of fruits and the crude saponin fraction of the peel was assessed using the Artemia salina test. The antimicrobial activities of caryocarosides IV-21 (14), II-1 (16), III-1 (17), and IV-9 (20) and of saponin 23 were also studied in vitro on Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Mycobacterium smegmatis, and Enterococcus faecalis bacteria.     

Triterpenoid saponins from the fruits of Ternstroemia japonica

Three new triterpenoidal monodesmosides (1-3) and three new triterpenoidal bisdesmosides (4-6), together with two known saponins (7 and 8), were isolated from the fresh fruits of Ternstroemia japonica. The structures of 1-6 (ternstroemiasides A-F) were elucidated on the basis of spectral analysis and chemical degradation.     

Triterpenoid saponins from the roots of Pulsatilla koreana

Six new saponins, five lupanes (1-5) and one oleanane (6), along with 11 known saponins, were isolated from the roots of Pulsatilla koreana. The structures of the new saponins were found to be 23-hydroxy-3beta-[(O-alpha-L-rhamnopyranosyl-(1-->2)-O-[O-beta-D-glucopyranosyl-(1-->4)]-alpha-L-arabinopyranosyl)oxy]lup-20(29)-en-28-oic acid (1), 23-hydroxy-3beta-[(O-beta-D-glucopyranosyl-(1-->3)-O-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranosyl)oxy]lup-20(29)-en-28-oic acid (2), 3beta-[(O-alpha-L-rhamnopyranosyl-(1-->2)-O-[O-beta-D-glucopyranosyl-(1-->4)]-alpha-L-arabinopyranosyl)oxy]lup-20(29)-en-28-oic acid (3), 3beta-[(O-beta-D-glucopyranosyl-(1-->3)-O-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranosyl)oxy]lup-20(29)-en-28-oic acid (4), 23-hydroxy-3beta-[(O-beta-D-glucopyranosyl-(1-->4)-alpha-L-arabinopyranosyl)oxy]lup-20(29)-en-28-oic acid (5), and hederagenin 3-O-beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->3)-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranoside (6). Their structures were determined on the basis of 1D and 2D NMR ((13)C NMR, (1)H NMR, (1)H-(1)H COSY, HMQC, and HMBC) methods, FABMS, and hydrolysis. All isolated compounds were evaluated for their cytotoxic activity against A-549 human lung carcinoma cells.     

Triterpenoid saponins of Acanthopanax nipponicus leaves

Five new triterpenoid saponins, nipponosides A-E (1, 3-6), were isolated from Acanthopanax nipponicus leaves, along with a known saponin, kalopanaxsaponin G (2). Nipponosides A-E were characterized as the 28-O-alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl(1-->6)-beta -D-glucopyranosyl ester of 3-oxohederagenin, oleanolic acid 3-O-beta-D-glucopyranoside, gypsogenin 3-O-beta-D-glucopyranoside, 3beta,23,29-trihydroxyolean-12-en-28-oic acid, and 3beta,20alpha, 23-trihydroxy-30-nor-olean-12-en-28-oic acid, respectively. The structures of these new compounds were based on chemical and spectral methods.     

太白银莲花地上部分三萜皂苷类化学成分的研究

目的 研究太白银莲花Anemone taipaiensis地上部分化学成分,并初步评估其肿瘤细胞增殖抑制活性。方法 采用正相硅胶、Sephadex LH-20凝胶、ODS反相柱色谱以及半制备高效液相色谱等手段进行分离纯化;根据波谱数据(1D-NMR、2D-NMR及MS)和理化性质鉴定化合物结构;采用MTT法评估化合物对2种人源肿瘤细胞(人急性早幼粒白血病HL-60细胞和人肝癌HepG2细胞)的增殖抑制活性。结果 从太白银莲花地上部分70%乙醇提取物的正丁醇萃取部位分离得到7个齐墩果烷型三萜皂苷类化合物,分别鉴定为常春藤皂苷元-3β-O-β-D-吡喃葡萄糖-(1→3)-α-L-吡喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖(1→4)-β-D-吡喃葡萄糖苷(1)、3β-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(2)、cernusoide C(3)、medicago-saponin P1(4)、常春藤皂苷元-3β-O-β-D-吡喃木糖-(1→3)-α-L-吡喃鼠李糖-(1→2)-[β-D-吡喃葡萄糖-(1...     

虎舌红根茎三萜皂苷类成分的研究

目的研究虎舌红Ardisia mamillata Hance根茎三萜皂苷类成分。方法虎舌红根茎80%乙醇提取物采用硅胶柱、Sephadex LH-20、重结晶等进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到7个化合物,分别鉴定为cyclaminorin(1)、ardisicrispin B(2)、3β-O-{α-L-吡喃鼠李糖基-(1→3)-β-D-吡喃葡萄糖基-(1→4)-α-L-吡喃阿拉伯糖基}-16-酮-西克拉敏A(3)、3β-O-{α-L-吡喃鼠李糖基-(1→3)-[β-D-吡喃木糖基-(1→2)]-β-D-吡喃葡萄糖基-(1→4)-α-L-吡喃阿拉伯糖基}-16-酮-西克拉敏A(4)、3β-O-{α-L-吡喃鼠李糖基-(1→3)-β-D-吡喃木糖糖基-(1→2)-[β-D-吡喃葡萄糖基-(1→4)]-α-L-吡喃阿拉伯糖基}-16α, 28-二羟基-12-烯-30-齐墩果酸(5)、3β-O-{α-L-吡喃鼠李糖基(1→3)-[β-D-吡喃木糖基-(1→2)]-β-D-吡喃葡萄糖基-(1→4)-[β-D-吡喃葡萄糖基-(1→2]-α-L-吡喃阿拉伯糖基}-16α-羟基-13β, 28-环氧-齐墩果烷(6)、3β-O-{α-L-吡喃鼠李糖基(1→3)-[β-D-吡喃木糖基-(1→2)]-β-D-吡喃葡萄糖基-(1→4)-[β-D-吡喃葡萄糖基-(1→2)]-α-L-吡喃阿拉伯糖基}-16α-羟基-30-乙酰氧基-13, 28-环氧-齐墩果烷(7)。结论化合物4～7为首次从该植物中分离得到,化合物5为首次从该属植物中分离得到。     

牛膝中的三萜皂苷类成分(英文)

目的:对牛膝(Achyranthese bidentata Bl.)根中的化学成分进行研究。方法:采用D101大孔树脂柱、硅胶柱、反相中压柱、凝胶柱和制备液相进行化学分离和纯化, 并利用各种波谱技术进行结构鉴定。结果:从牛膝中分离并鉴定了5个皂苷类化合物, 分别为:牛膝皂苷 C(1)、牛膝皂苷 D(2)、竹节参皂苷Ⅳ(3)、人参皂苷Ro(4)和姜状三七苷 R1(5)。结论:化合物1为首次从自然界中获得,化合物3为首次从苋科植物中分离得到。     

藏柴胡中三萜皂苷类成分的研究

该研究主要探究藏柴胡中的三萜皂苷类成分。采用大孔吸附树脂,MCI,硅胶,ODS,MDS柱色谱以及半制备高效液相色谱等分离纯化方法,从藏柴胡70%乙醇(含0.5%氨水)提取物中得到12个化合物。利用高分辨质谱、核磁共振等波谱手段鉴定其结构分别为柴胡皂苷b2(1),柴胡皂苷a(2),柴胡皂苷b1(3),柴胡皂苷d(4),hydroxysaikosaponin a(5),柴胡皂苷b3(6),柴胡皂苷c(7),柴胡皂苷i(8),柴胡皂苷f(9),chikusaikosidesⅡ(10),柴胡皂苷s(11),柴胡皂苷I(12)。12个化合物均属齐墩果烷型三萜皂苷类化合物,其中化合物1,3,5,8~9,11~12均为首次从该植物中分离得到。体外抗流感病毒实验表明在20μmol·L-1下,化合物2,4,6,8,11~12对流感病毒WSN33具有较明显抑制作用,其抑制率分别为91.3%,88.6%,53.4%,61.3%,77.3%,57.4%。     

素馨花三萜皂苷类化学成分研究

目的:研究木犀科茉莉属植物素馨花干燥花蕾的化学成分。方法:通过硅胶柱色谱、Sephadex LH-20柱色谱和重结晶等方法进行分离纯化,根据化合物的理化性质和波谱数据鉴定结构。结果:从素馨花干燥花蕾70%乙醇提取物中分离得到6个三萜皂苷类化合物,分别鉴定为3-O-α-L-吡喃鼠李糖基(1→2)-β-D-吡喃木糖基常春藤皂苷元-28-O-β-D-吡喃半乳糖基(1→6)-β-D-吡喃半乳糖酯苷(1)、常春藤皂苷元3-O-β-D-吡喃葡萄糖基(1→3)-α-L-吡喃阿拉伯糖苷(2)、2α,3β,23-trihydroxyolean-12-en-28-oic-O-β-D-glucopyranosyl ester(3)、常春藤皂昔元-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(4)、2α,3β,23-trihydroxyolean-12-en-28-oic-O-α-L-rhamnopyranosyl(1→4)-O-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester(5)、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(6)。结论:化合物1为新化合物,化合物26为首次从茉莉属植物中分离得到。     

没药中环阿尔廷烷型三萜的生物转化研究

目的:对爱伦堡没药中分离获得的环阿尔廷-24-烯-1α,2α,3β-三醇开展生物转化研究,以期获得抗肿瘤活性好、结构新颖的环阿尔廷烷型三萜衍生物。方法:采用马铃薯培养基,将底物加入到14株菌株培养液中,27.8℃培养7 d,以TLC检测产物,筛选具有转化能力的菌株;选择微紫青霉开展制备级转化试验,27.8℃培养10d,乙酸乙酯萃取后,硅胶柱色谱分离纯化转化产物,以质谱、核磁共振波谱确定其结构,并采用MTT法测定其对人前列腺癌细胞株生长抑制作用。结果:微紫青霉对底物进行了转化,获得了两个新的环阿尔廷烷型三萜,产率为21.15%;产物对人前列腺癌细胞PC3和DU145具有生长抑制作用,IC50值为14.5和27.8μmol/L。结论:环阿尔廷烷型三萜能被微紫青霉生物转化,产生两个新的羟基化衍生物。     

Triterpenoid Saponins from Roots of Gypsophila pacifica

Objective To study the chemical constituents from the roots of Gypsophila pacifica.Methods The chemical constituents were isolated by various column chromatographic methods and their structures were identified by spectral data together with physicochemical analysis.Results Five compounds were isolated and identified as 3-O-β-D-galactopyranosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-glucuronopyranosyl gypsogenin 28-O-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-β-D-fucopyranoside(1),3-O-β-D-galactopyranosy...     

金铁锁中一个新的三萜皂苷

目的：研究金铁锁根的化学成分。方法：采用硅胶柱色谱、凝胶柱色谱和反相色谱分离纯化,利用ESI—MS,EI-MS,NMR确定化合物结构。结果：分离并鉴定了3个化合物,分别为3-O-β-D—galactopyranosyl-（1→2）-[β-D—xylopyranosyl-（1—3）]-β-D-6-O—methylglucuronopyranosyl—gypsogenin（1）,2α—hydroxy—ursolic acid（2）,tormentic acid（3）。结论：化合物1为新化合物,化合物2、3均为首次从该属植物中分离得到。