黄连花皂苷类成分HPLC—ELSD法分析

目的:建立黄连花皂苷类成分HPLC分析方法。方法:应用HPLC-ELSD对黄连花分离得到的9种皂苷进行分析测定,以Zorbax SB-C18(4.6 mm×150 mm,5μm)为分析色谱柱,以乙腈-水(含0.2％醋酸)为流动相梯度洗脱,流速1 mL·min-1,蒸发光散射检测器,雾化气体流速3.35 L·min-1,漂移管温度117℃。结果:9种皂苷能较好地分离,通过对黄连花全草进行分析,表明Primulanin和黄连花皂苷L(davuricoside L)含量较高。结论:HPLC-ELSD适合没有紫外吸收或紫外吸收弱的皂苷类成分的分析。     

细梗香草中的两个新三萜皂苷

目的对细梗香草(Lysimachia capillipes Hemsl.)全草的三萜皂苷成分进行分离和结构鉴定。方法通过大孔树脂纯化，硅胶和反相硅胶色谱分离正丁醇萃取物中的三萜皂苷；利用多种波谱技术并结合酸水解方法鉴定其化学结构。结果分离鉴定了2个三萜皂苷，其结构分别为3β，22α-二羟基-16α-当归酰氧基-28→13-内酯-齐墩果烷-3-O-［β-D-吡喃葡糖基-(1→2)-α-L-吡喃阿拉伯糖基］-22-O-(6-乙酰基)-β-D-吡喃葡糖苷(I),3β,13β,22α-三羟基-16α-乙酰氧基-齐墩果烷-28羧酸钠-3-O-［β-D-吡喃葡糖基-(1→2)-α-L-吡喃阿拉伯糖基］-22-O-β-D-吡喃葡糖苷(II)。结论化合物I和II为新的三萜皂苷，分别命名为细梗香草皂苷I和细梗香草皂苷J。     

花刺参中三个新的三萜皂苷类化合物

目的 研究花刺参体内的活性皂苷类成分。方法 运用硅胶、Sephadex LH-20柱色谱等方法进行分离纯化,利用IR,¹H、¹³C NMR,MS等光谱技术鉴定其化学结构。结果 从花刺参中分离并鉴定出3个化合物,分别为3-O-[3-O-甲基-β-D-吡喃葡萄糖-（1→3）-β-D-吡喃木糖-（1→3）-β-D-吡喃葡萄糖-（1→2）-β-D-吡喃木糖]-海参烷-7,24-二烯-3β,23S-二醇,命名为variegatuside C;3-O-{3-O-甲基-β-D-吡喃葡萄糖-（1→3）-β-D-吡喃木糖-（1→4）-β-D-吡喃葡萄糖-（1→2）[β-D-吡喃葡萄糖-（1→4）]-β-D-吡喃木糖}-海参烷-8-烯-3β,23S-二醇,命名为variegatuside D;3-O-{3-O-甲基-β-D-吡喃葡萄糖-（1→3）-β-D-吡喃木糖-（1→4）-β-D-吡喃葡萄糖-（1→2）[3-O-甲基-β-D-吡喃葡萄糖-（1→3）-β-D-吡喃葡萄糖-（1→4）]-β-D-吡喃木糖}-海参烷-9-烯-3β,23S-二醇,命名为variegatuside E。结论 3个化合物均为新化合物。     

从三叶木通茎中分得新的三萜和三萜皂苷

作者从三叶木通Akebia trifoliata茎中分离、鉴定了3个新的三萜化合物(1～3)和3个新的三萜皂苷(11～13)，以及7个已知三萜(4～10)和12个已知三萜皂苷(14～25)。     

白木通中一个新的三萜皂苷类化合物

目的研究木通科植物白木通藤茎的化学成分。方法通过反复硅胶柱色谱、ODS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。结果从白木通藤茎70%乙醇提取物中分离得到6个化合物。分别鉴定为2α,3β,23-trihydroxyolean-12-en-28-oic acid =O-β-D-xylopyranosyl-(1→3)-O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (I), 2α,3β,23-trihydroxyurs-12-en-28-oic acid O-β-D-xylopyranosyl-(1→3)-O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (II), 2α,3β,23-trihydroxyolean-12-en-28-oic acid O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (III), 2α,3β,23-trihydroxyurs-12-en-28-oic acid O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (IV), 2α,3β,23-trihydroxyolean-12-en-28-oic acid O-β-D-glucopyranosyl ester (V), 2α,3β,23-trihydroxyurs-12-en-28-oic acid O-β-D-glucopyranosyl ester (VI)。结论化合物II为新化合物，命名为mutongsaponin C，其他均为首次从该植物藤茎中分离得到。     

小花草玉梅中一个新的三萜皂苷

目的研究小花草玉梅的化学成分。方法采用硅胶柱色谱、葡聚糖凝胶色谱、制备薄层色谱等色谱技术分离纯化,经NMR、MS波谱解析,结合理化性质鉴定化合物结构。结果从该植物中分离鉴定了1个三萜皂苷化合物,命名为:3-O-{β-D-吡喃葡萄糖基-(1→3)-O-[β-D-吡喃木糖基-(1→2)]-O-α-L-吡喃阿拉伯糖基}-常春藤皂苷元-28-O-β-D-吡喃葡萄糖酯苷。结论经Sci Finder数据库检索确定该化合物为新化合物。     

九子参中一个新三萜皂苷

运用硅胶、SephadexLH-20、0DD以及高效液相色谱法,从九子参的根中分离得到一个新三萜皂苷和一个已知三萜皂苷。通过质谱以及一维二维核磁确定了化合物的结构。化合物1和2均为首次从该属植物中分离得到。     

玉足海参中一个新的三萜皂苷脱硫衍生物

目的分离并鉴定玉足海参体内皂苷类化合物的结构。方法将自玉足海参体内提取得到的皂苷leu-cospilotaside A溶于吡啶∶二氧六环(1∶1)的混合液中。120℃加热3h,应用多种色谱技术对回流产物进行分离纯化,根据化合物的理化性质和波谱数据鉴定其结构。结果分离并鉴定了1个三萜皂苷类化合物:3-O-{-βD-吡喃奎诺糖(1(2)-β-D-吡喃木糖}-海参烷-9-烯-22-酮-3β,12α,17α,25α-四醇。结论玉足海参中提取的三萜皂苷leucospilotaside A脱硫衍生物为新化合物。     

HPLC-ELSD法测定四季青中三萜及其皂苷的含量

目的建立同时测定四季青中3种三萜及其皂苷——长梗冬青苷、地榆皂苷I和救必应酸含量的HPLC分析方法。方法C₁₈柱；流动相：甲醇-水（59∶41）；流速1.0 mL·min^-1；检测器：Sedex 55蒸发光散射检测器。结果线性范围为长梗冬青苷2.56～25.60　μg（r=0.999.2），地榆皂苷I 1.64～16.40μg（r=0.998　2）和救必应酸3.74～37.40　μg（r=0.999.4）。平均加样回收率为长梗冬青苷96.3%, RSD　1.6%　(n=5); 地榆皂苷I 97.3%, RSD　3.8% (n=5)；救必应酸97.7%, RSD2.1%　(n=5)。3个化合物的精密度RSD　(n=6)均<4%; 重现性RSD　(n=6)均<5%。结论本方法简便、有效、可行，可用于四季青三萜及其皂苷的含量测定。     

加拿大产西洋参茎叶中的三个新三萜皂苷

从加拿大产西洋参的茎叶分离得到一种新达玛烷型三萜皂苷，利用理化性质和光谱数据，鉴定为３－Ｏ－１２－羟基达玛－２３，２５－二烯－２０－β－Ｄ－哟喃葡萄糖苷，命名为西洋参皂苷Ｌ１。     

Two new triterpene saponins from Lysimachia davurica

Two new saponins, named davuricoside L (1) and davuricoside O (2), have been isolated from the whole plants of Lysimachia davurica. Their structures were determined by 1D and 2D NMR, FAB-MS techniques, and chemical methods.     

Two new triterpene saponins from Lysimachia davurica

Two new saponins, named davuricoside L (1) and davuricoside O (2), have been isolated from the whole plants of Lysimachia davurica. Their structures were determined by 1D and 2D NMR, FAB-MS techniques, and chemical methods.     

Two new triterpenoid saponins from the flowers and buds of Lonicera japonica

Two new triterpenoid saponins, loniceroside D (1) and loniceroside E (2), were isolated from the dry flowers and buds of Lonicera japonica Thunb., along with seven known compounds, chlorogenic acid (3), sweroside (4), vogeloside (5), epi-vogeloside (6), loniceroside A (7), loniceroside B (8), and loniceroside C (9). Their structures were elucidated on the basis of spectroscopic data, physicochemical properties, and acid hydrolysis.     

Two new triterpenoid saponins from Glochidion puberum

Two new triterpenoid saponins, puberosides A and B, were isolated from the aerial parts of Glochidion puberum. Their structures were elucidated as 3α-[(O-β-d-glucopyranosyl-(1 → 3)-O-α-l-arabinopyranosyl)oxy]-22α-benzoyloxy-olean-12-ene-16α,28-diol (1) and 3α-[(O-β-d-glucopyranosyl-(1 → 3)-O-α-l-arabinopyranosyl)oxy]-28-benzoyloxy-olean-12-ene-16α,22α-diol (2) by analysis of their spectroscopic data.     

Two new triterpenoid saponins from ginseng medicinal fungal substance

Two new dammarane-type triterpenoid saponins, namely ginsenosides Rb₄ (1) and Rb₅ (2), were isolated from ginseng medicinal fungal substance. The structures of 1 and 2 were established as 3β,12β,20(S)-trihydroxydammar-24(25)-ene-3-O-[α-d-glucopyranosyl-(1→4)-β-d-glucopyranosyl-(1→2)-β-d-glucopyranosyl]-20-O-β-d-glucopyranoside and 3β,12β,20(S)-trihydroxydammar-24(25)-ene-3-O-[α-d-glucopyranosyl-(1→4)-α-d-glucopyranosyl-(1→4)-β-d-glucopyranosyl-(1→2)-β-d-glucopyranosyl]-20-O-β-d-glucopyranoside on the basis of spectroscopic analysis and chemical analysis, respectively.     

Two new triterpene saponins from Lysimachia capillipes

Two new saponins, capilliposide G (1) and capilliposide H (2), were isolated from the whole plants of Lysimachia capillipes. Their structures were determined by 1D and 2D NMR, MS technique and chemical methods.     

Two new triterpenoid saponins from Sarcandra glabra

Two new triterpenoid saponins, named sarcandroside A and B, have been isolated from Sarcandra glabra (Thunb) Nakai. Their structures have been established as 3β,19α,20β-trihydroxyurs-11,13 (18)-diene-28,20β-lactone-3-O-β-d-glucopyranosyl (1 → 3)-[α-l-rhamnopyranosyl(1 → 2)]-β-d-xylopyranoside (1) and 3-O-β-d-glucopyranosyl (1 → 3)-[α-l-rhamnopyranosyl(1 → 2)]-β-d-xylopyranosyl-pomolic acid 28-O-β-d-glucopyranosyl ester (2) by means of spectral and chemical methods.     

Two new dammarane-type triterpenoid saponins from notoginseng medicinal fungal substance

Two new dammarane-type triterpenoid saponins, namely ginsenoside Rk₆ (1) and ginsenoside-Rh₂₂ (2), were isolated from notoginseng medicinal fungal substance. The structures of 1 and 2 were established as 3β,6α,12β,26-tetrahydroxydammar-20(21),24(25)(E)-diene-6-O-β-D-glucopyranoside and 3β,6α, 20(S)-trihydroxy-12(R),23(R)-expoxy-13(S),17(S)-dammar-24-ene-6-O-β-D-glucopyranoside on the basis of spectroscopic analysis and chemical analysis, respectively.     

Two new triterpene saponins from Lysimachia capillipes

Two new saponins, capilliposide G (1) and capilliposide H (2), were isolated from the whole plants of Lysimachia capillipes. Their structures were determined by 1D and 2D NMR, MS technique and chemical methods.