A new aromatic glycoside and its anti-proliferative activities from the leaves of Bergenia purpurascens.

Chemical investigation of the ethanolic extracts of the dried leaves of Bergenia purpurascens led to the isolation and identification of a new aromatic glycoside, 1-O-β-D-glucopyranosyl-2-methoxy-3-hydroxyl-phenylethene (1), along with other 19 known compounds (2-20). The structure of compound 1 was determined by a detailed analysis using various analytical techniques, including 1D and 2D NMR. In vitro anti-proliferative activities of compound 1 on five human cancer cell lines were evaluated.

Chemical Constituents of the Aerial Parts of Euphorbia nematocypha.

Chemical constituents of the dried aerial parts of Euphorbia nematocypha were investigated. A new oleanane triterpenoid, trans, trans-2',4'- hexadienedioicacid-1'-β-amyrin ester (1), together with, β-amyrin (2), β-amyrin acetate (3), betulinic acid (4), ellagic acid (5), oleanolic acid (6), β-sitosterol (7), kaempferol (8), quercetin (9), lupeol (10) and pseudo-taraxasterol (11) were isolated from the methylene chloride extract. Their structures were elucidated on the basis of extensive spectroscopic (1D- & 2D-NMR) and ESI-MS analysis and comparison with data reported in the literature.

Two new 2,3-seco-hopane triterpene derivatives from Megacodon stylophorus and their antiproliferative and antimicrobial activities.

Chemical investigation of the ethanol extract of the whole plant of Megacodon stylophorus led to the isolation and identification of two new seco-hopane triterpenoids, 2,3-seco-22(29)-hopene-2-carboxyl-3-aldehyde (1) and 2,3-seco-4(23),22(29)-hopene-2-carboxyl-3-aldehyde (2), along with 10 known compounds, 3-12. All the isolates were reported from this plant for the first time. The structures of compounds 1 and 2 were determined by detailed analysis of their spectral data including 1D and 2D NMR.

Two new sesquiterpenes from Artemisia sieversiana.

Two new sesquiterpenes, together with 32 known compounds(3-34), were isolated from Artemisia sieversiana Ehrhart ex willd. and the compounds 3-21 were isolated from this plant for the first time. The new compounds were elucidated as 2α,9α-dihydroxymuurol-3(4)-en-12-oic acid (1) and 13α-methyl-(5αH,6αH,7αH,8αH)-austricin 8-O-β-D-glucopyranoside (2), respectively.

Norlathyrane diterpenes from the root of Euphorbia kansuensis.

Phytochemical investigation of the EtOH extract obtained from the root of the Euphorbia kansuensis Proch. grown in China resulted in the isolation of two novel norlathyrane diterpenes, named ekanpenoids A and B (1 and 2, resp.).

Triterpenoid saponins with anti-myocardial ischemia activity from the whole plants of Clematis tangutica.

Four new triterpenoid saponins named clematangosides A-D (1-4) along with six known saponins (5-10) were isolated from the whole plants of Clematis tangutica. Their structures were determined by extensive spectral analysis and chemical evidences. All saponins were evaluated for their protective effects in hypoxia-induced myocardial injury model.

Triterpenoids of Chrysosplenium carnosum.

A phytochemical study of the ethanolic extract of Chrysosplenium carnosum Hook. f. et Thoms.

Triterpenoid saponins from Clematis tangutica and their cardioprotective activities.

Phytochemical investigation of the whole plants of Clematis tangutica led to the isolation of three new triterpenoid saponins (1-3), together with four known saponins (4-7). Their structures were determined by extensive spectral analysis and chemical evidences. Compounds 1-7 were evaluated for their cardioprotective activities in cardiomyocytes anoxia/reoxygenation (A/R) model.

[Simultaneous determination of four constituents in wild Gentiana lawrencei from Qinghai province by RP-HPLC].

Objective: To establish a RP-HPLC method for simultaneously determination of swertiamarin, gentiopicroside, sweroside, isoorientin in Gentiana lawrencei from Qinghai province.

Method: The RP-HPLC method was used. Chromatographic column was the Kromasil C18 column (4.

[Simultaneous determination of six main constituents in Swertia of Qinghai Province and Sichuan Province by HPLC].

Objective: To establish a quantitative method of simultaneously determination of swertiamarin, gentiopicroside, mangiferin, swertianolin, isoorientin, 1,8-drihydroxy-3-methoxy-xthanone in Swertia from Qinghai province and Sichuan province by HPLC.

Method: The samples were separated on the column of Kromasil C18 (4. 6 mm x 250 mm, 5 microm) which eluted with methanol and water (content 0.

[Study on HPLC fingerprint of Swertia mussotii var. mussotii from north-west area of Sichuan Province I].

Objective: To constitute HPLC fingerprint of the methanol extract from Swertia mussotii grown in Sichuan Province.

Method: RP-HPLC, methanol and water including 0.02% acid as mobile phase, gradient elution, flow rate 1.

[Content determination of loganic acid and gentiopicroside in Tebitan herbal medicines Gentiana macrophylla and G. straminea by HPLC].

A quantitative method to determine loganic acid and gentiopicroside in Gentiana macrophylla Pall. and Gentiana straminea Maxim. by RP-HPLC was established in this paper.

[Determination of haleniaside and demethoxyhaleniaside in wild and cultivated Halenia ellipitica D. Don. by reversed-phase high performance liquid chromatography].

A simple and accurate method for the determination of haleniaside and demethoxyhaleniaside in Halenia ellipitica D. Don. materials and patent medicines with high performance liquid chromatography (HPLC) was developed.