Two new furostanol saponins from the fibrous root of Ophiopogon japonicus

Two new furostanol saponins ophiopogonins J (1) and K (2) were isolated from the fibrous roots of Ophiopogon japonicus. The structures of 1 and 2 were established as (25R)-26-O-[(β-d-glucopyranosyl-(1 → 2)-β-d-glucopyranosyl)]-14-hydroxy-furost-5,20(22)-diene 3-O-[α-l-rhamnopyranosyl-(1 → 2)]-β-d-glucopyranoside (1), and (25R)-26-O-[(β-d-glucopyranosyl-(1 → 2)-β-d-glucopyranosyl)]-furost-5,20(22)-diene 3-O-α-l-rhamnopyranosyl-(1 → 2)[(β-d-xylopyranosyl-(1 → 4)-β-d-glucopyranoside)] (2) on the basis of spectroscopic means including HRESIMS, 1D, and 2D NMR experiments.     

Two new homoisoflavonoids from the fibrous roots of Ophiopogon japonicus (Thunb.) Ker-Gawl

Two new homoisoflavonoids ophiopogonone D (1) and ophiopogonanone G (2) were isolated from the fibrous roots of Ophiopogon japonicus. The structures of these two compounds were determined on the basis of spectroscopic means including HR-ESI-MS, 1D, and 2D NMR experiments. The cytotoxic activities of 1 and 2 against Hela and Hep2 cells are described.     

Two novel furostanol saponins from Ophiopogon japonicus

Two novel furostanol saponins were isolated from the fresh tubers of Ophiopogon japonicus. Comprehensive spectroscopic analysis allowed the chemical structures of the compounds to be assigned as (25R)-26-[(O-β-d-glucopyranosyl-(1 → 2)-β-d-glucopyranosyl)]-22α-hydroxyfurost-5-ene-3-O-β-d-xylopyranosyl-(1 → 4)-O-[α-l-rhamnopyranosyl-(1 → 2)]-β-d-glucopyranoside (1, ophiopogonin F) and (25R)-26-[(O-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranosyl)]-22α-hydroxyfurost-5-ene-3-O-β-d-xylopyranosyl-(1 → 4)-O-[α-l-rhamnopyranosyl-(1 → 2)]-β-d-glucopyranoside (2, ophiopogonin G). The rare furostanol saponins with two glucosyl residues at C-26 position were isolated from the natural source for the first time.     

New sesquiterpenoid glycoside and phenylpropanoid glycosides from the tuber of Ophiopogon japonicus

A new sesquiterpenoid glycoside, cryptomeridiol 11-O-β-d-xylopyranosyl-(1→6)-β-d- glucopyranoside (1), two new phenylpropanoid glycosides, 3,4-dihydroxy-allylbenzene 3-O-β-d-glucopyranosyl-4-O-β-d-apiofuranosyl-(1→6)-β-d-glucopyranoside (2), and 3,4,5-trihydroxy-allylbenzene 3-O-β-d-glucopyranosyl-4-O-β-d-glucopyranoside (3), along with four known phenylpropanoid glycosides (4–7), were isolated from the tuber of Ophiopogon japonicus. Compounds 4–7 were obtained from the genus Ophiopogon for the first time. Their structures were elucidated by spectroscopic methods, including 1D and 2D NMR and HR-ESI-MS.     

Studies on chemical constituents of Ophiopogon japonicus

Two new and six known steroidal glucosides were isolated from the tuber of Ophiopogon japonicus. The new steroidal glucosides were established as (20R,25R)-26-O-β-d-glucopyranosyl-3β,26-dihydroxycholest-5-en-16,22-dioxo-3-O-α-l-rhamnopyranosyl-(1 → 2)-β-d-glucopyranoside (1) and 26-O-β-d-glucopyranosyl-(25R)-furost-5-en-3β,14α,17α,22α,26-pentaol-3-O-α-l-rhamnopyranosyl-(1 → 2)-β-d-glucopyranoside (3) on the basis of spectroscopic data as well as chemical evidence.     

Two new glycosides from Leonurus japonicus

Two new glycosides, 1,6-di-O-syringoyl-β-d-glucopyranose (1) and quercetin 3-O-[(3-O-syringoyl-α-l-rhamnopyranosyl)-(1 → 6)-β-d-glucopyranoside] (2), along with seven known compounds were isolated from the MeOH extract of Leonurus japonicus. The structures of these compounds were elucidated by spectral analysis.     

天门冬中的两个新呋甾皂苷aspacochinoside L和aspacochinoside M(英文)

从天门冬的根中分离得到两个新呋甾烷型皂苷aspacochinoside L(1)和aspacochinoside M(2),通过化学和波谱学方法确定了化合物1和2的结构。利用脂多糖(LPS)诱导的小胶质细胞(BV-2)炎症模型,测试了化合物的抗炎活性,其中aspacochinoside M的IC50值为32.26μM。     

A novel steroidal glycoside, ophiofurospiside A from Ophiopogon japonicus (Thunb.) Ker-Gawl

A new furospirostanol saponin, ophiofurospiside A (1), was isolated together with the known steroidal glycosides 2, 3, and 4 from the tubers of Ophiopogon japonicus (Thunb.) Ker-Gawl. Using chemical and spectral analyses (IR, MS, 1D NMR, and 2D NMR), the structure of 1 was established as 26-O-beta-d-glucopyranosyl-(22S, 25R)-furospirost-5-ene-3beta, 17alpha, 26-triol-3-O-[alpha-l-rhamnopyranosyl-(1 --> 2)]-[beta-d-xylopyranosyl-(1 --> 4)]-glucopyranoside (1). Three known steroidal saponins 2-4 were identified on the basis of spectroscopic data.     

HPLC法同时测定麦冬药材中麦冬皂苷Ra和慈溪麦冬皂苷A的含量

目的:建立以高效液相色谱法测定麦冬药材中麦冬皂苷Ra和慈溪麦冬皂苷A含量的方法。方法:色谱柱为Waters C18(150mm×4.6mm,5μm),流动相为乙腈-水(35∶65),流速为1.0mL·min-1,检测波长为208nm,柱温为室温。结果:麦冬皂苷Ra、慈溪麦冬皂苷A的进样量分别在1.88～9.40μg(r=0.9996)、1.96～9.80μg(r=0.9995)范围内与各自峰面积积分值呈良好线性关系;平均回收率分别为100.2%、99.7%,RSD均为1.7%(n=6)。结论:本方法简便、快速、准确,可用于麦冬药材的质量控制。     

麦冬中几种二氢高异黄酮的立体结构

目的研究麦冬中几种二氢高异黄酮的立体结构。方法采用光谱方法,并用圆二色谱确定立体结构。结果确定6个二氢高异黄酮的立体结构,鉴定结果为:5,7-d ihydroxy-6-m ethyl-8-m ethoxy-3(R)-(2-′hydroxy-4′-m ethoxy-benzyl)chroman-4-one(Ⅰa);5,7-d ihydroxy-6-methyl-8-methoxy-3(S)-(2′-hydroxy-4′-methoxybenzyl)chroman-4-one(Ⅰb);5,7-d ihydroxy-6,8-d im ethyl-3(R)-(3-′m ethoxy-4-′hydroxybenzyl)chrom an-4-one(Ⅱa);5,7-d ihydroxy-6,8-d im ethyl-3(S)-(3′-m ethoxy-4′-hydroxybenzyl)chrom an-4-one(Ⅱb);R-m ethyloph iopogonanone B(Ⅲ)和R-m ethyloph iopogonanone A(Ⅳ)。结论首次确定了6个二氢高异黄酮(Ⅰ~Ⅳ)的立体构型。     

Two new furostanol saponins from Tribulus terrestris

Two new furostanol saponins were isolated from the fruits of Tribulus terrestris L. Their structures were established as 26-O-β-d-glucopyranosyl-(25S)-5α-furost-20(22)-en-3β,26-diol-3-O-α-l-rhamnopyranosyl-(1 → 2)-[β-d-glucopyranosyl-(1 → 4)]-β-d-galactopyranoside (1) and 26-O-β-d-glucopyranosyl-(25S)-5α-furost-20(22)-en-12-one-3β,26-diol-3-O-β-d-galactopyranosyl-(1 → 2)-β-d-glucopyranosyl-(1 → 4)-β-d-galactopyranoside (2) on the basis of spectroscopic data as well as chemical evidence.     

麦冬多糖Md-1、Md-2化学结构的研究

目的　研究中药麦冬中的多糖化学结构。方法　采用柱层析法进行纯化 ,并用红外光谱和核磁等方法阐明 Md- 1、Md- 2的化学结构。结果　 Md- 1、Md- 2的相对分子质量分别为 2 70 6 4和 4 86 5 1。Md- 1、Md- 2多糖的糖单元基本组成是葡萄糖。其中 Md- 1多糖中平均每 8个葡萄糖单元中连有 1个硫酸基 ,Md- 2多糖中平均每 6个葡萄糖单元中连有 1个硫酸基。构型均为α型 ,单糖的连接方式为 1→ 4连接。结论　 Md- 1、Md- 2多糖的化学结构均为有一甲醚基取代的 α- D- (1→ 4 )的葡聚糖 ,两种多糖的相对分子质量和硫酸基的含量不同     

Six new furostanol glycosides from Smilax glauco-china and their cytotoxic activity

Six new steroidal saponins, namely glauco-chinaosides A–F, and one known compound were isolated from the tubers of Smilax glauco-china. Their structures were elucidated by a combination of spectroscopic analysis and hydrolysis followed by spectral and chromatographic analysis. Compounds 1–7 were tested in vitro for their cytotoxic activities against four human tumor cell lines (SH-SY5Y, SGC-7901, HCT-116, and Lovo). Compounds 1, 2, and 5 exhibited cytotoxic activity against SGC-7901, with IC₅₀ values of 2.7, 11.5, and 6.8 μM, respectively.     

Two new furostanol saponins from the seeds of Trigonella foenum-graecum

Two new furostanol saponins, together with two known steroidal saponins, were isolated from the seeds of Trigonella foenum-graecum L. The structures of the new compounds were determined by detailed analysis of 1D NMR, 2D NMR, MS spectra and chemical evidences as 26-O-β-d-glucopyranosyl-(25S)-5-en-furost-3β,22α,26-triol 3-O-α-l-rhamnopyranosyl-(1 → 2)-[β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranosyl-(1 → 3)-β-d-glucopyranosyl-(1 → 4)]-β-d-glucopyranoside (1) and 26-O-β-d-glucopyranosyl-(25R)-5-en-furost-3β,22α,26-triol 3-O-α-l-rhamnopyranosyl-(1 → 2)-[β-d-glucopyranosyl-(1 → 6)]-β-d-glucopyranosyl-(1 → 3)-β-d-glucopyranosyl-(1 → 4)]-β-d-glucopyranoside (2).     

川麦冬中麦冬皂苷D对照品的制备

目的：建立从麦冬中制备麦冬皂苷D对照品的方法。方法：用萃取、硅胶柱层析、凝胶柱层析、重结晶等方法对麦冬乙醇提取物进行分离纯化,通过MS、IR,^1H—NMR．^13C—NMR进行结构鉴定。结果：薄层色谱法（TLC）、高效液相色谱法（HPLC—ELSD）检测分析,麦冬皂苷D的纯度为99％以上。结论：本方法简便,产品纯度高,该对照品可作为川麦冬及其制剂质量的指标成分。     

Influence of sulfation on anti-myocardial ischemic activity of Ophiopogon japonicus polysaccharide

Ophiopogon japonicus polysaccharide (FOJ-5) from Radix ophiopogonis has shown anti-myocardial ischemic action in vitro and in vivo in our previous studies. In order to clarify the influence of chemical modifications on the action, a series of sulfated FOJ-5 (FOJ-5-S) with different substitution degrees were prepared and the anti-myocardial ischemic action of the natural FOJ-5 and the FOJ-5-S were studied in vitro and in vivo. Langendorff isolated rat hearts and acute myocardial ischemic rats induced by isoprenaline were employed as myocardial ischemic models in our experiments. The amplitude and frequency of cardiac contraction, coronary blood flow at different time points after ischemia/reperfusion were measured in vitro. The ST segment shift in electrocardiogram and lactate dehydrogenase level in blood plasma were observed on the in vivo model. The results indicated that FOJ-5 and FOJ-5-S had the anti-myocardial ischemic action compared with non-treated vehicle groups. Furthermore, it was found that FOJ-5-S had significant action on the in vivo model compared with FOJ-5 (P < 0.05). And the obtained results from the further study also indicated that only when the degree of substitution was in a certain range, the FOJ-5-S had excellent anti-myocardial ischemic activity.     

Two new furostanol saponins from Tribulus terrestris L.

Two new furostanol saponins, tribufurosides B (1) and C (2), were isolated from the fruits of Tribulus terrestris L. With the help of chemical and spectral analyses (IR, MS, 1D NMR and 2D NMR), the structures of two new furostanol saponins were established as 26-O-β-d-glucopyranosyl-(25S)-5α-furost-20(22)-en-2α,3β,26-triol-3-O-β-d-galactopyranosyl(1 → 2)-β-d-glucopyranosyl(1 → 2)-β-d-galactopyranoside (1) and (25S)-5α-furost-20(22)-en-12-one-3β, 26-diol-26-O-β-d-glucopyranoside (2).     

知母中的两种新呋甾皂苷

目的研究知母根茎的化学成分。方法采用水煎提取、大孔吸附树脂SP825柱色谱、反相C₁₈柱色谱等进行分离，并通过化学手段和光谱分析(FAB-MS，¹H NMR，13C NMR，¹H-¹H COSY)鉴定其化学结构。结果从知母根茎中分离得到6种甾体皂苷，分别鉴定为：(25S)-26-O-β-D-吡喃葡糖基-22-羟基-5β-呋甾-2β，3β，26-三醇-3-O-β-D-吡喃葡糖基-(1→2)-β-D-吡喃半乳糖苷(知母皂苷N，1)，知母皂苷E_l(2)，(25S)-26-O-β-D-吡喃葡糖基-22-甲氧基-5β-呋甾-2β，3β，26-三醇-3-O-β-D-吡喃葡糖基-(1→2)-β-D-吡喃半乳糖苷(知母皂苷O，3)，知母皂苷E₂(4)，(25R)-26-O-β-D-吡喃葡糖基-22-羟基-5α-呋甾-2α，3β，26-三醇-3-O-β-D-吡喃葡糖基-(1→2)-［β-D-吡喃木糖基-(1→3)］-β-D-吡喃葡糖基-(1→4)-β-D-吡喃半乳糖苷(purpureagitosid，5)，marcogenin-3-O-β-D-glucopyranosyl-(1→2)-β-D-galactopyranoside (6)。结论化合物1和3为新化合物，命名为知母皂苷N和知母皂苷O，化合物5为首次从知母中分离得到。     

麦冬不同提取部位对过氧化氢所致血管内皮细胞损伤的保护作用

目的观察麦冬不同提取部位对H2O2致血管内皮细胞损伤的保护程度是否不同。方法分别用正丁醇、水和氯仿提取麦冬。含终浓度为12.9mg.L-1的各提取部位与H2O2100μmol.L-1共同作用于培养的人脐静脉血管内皮细胞(HUVEC)24h,流式细胞仪测定细胞的凋亡率,并测定上清培养液中超氧化物歧化酶(SOD)活性和脂质过氧化物丙二醛(MDA)含量。结果麦冬3个提取部位均能减少HUVEC凋亡,其中正丁醇提取部位作用更强些。3个部位均能提高细胞培养液中SOD活性;正丁醇和氯仿提取部位能降低MDA含量。结论麦冬正丁醇、水和氯仿提取部位均可不同程度地保护HUVEC。