Pentacyclic triterpenes from leaves of Cagaita (Eugenia dysenterica)Cristian A. Gasca, Matheus Chaves, Christopher W. Fagg, Pérola de Oliveira e Magalhães, Yris M. Fonseca-Bazzo, Dâmaris Silveira

The chromatography fractionation of the hexane, chloroform and ethyl acetate extracts from the leaves and stems of Rourea doniana Baker, Connaraceae, resulted in the isolation of five triterpenes (lupeol, lupenone, α-amyrenone, β-amyrenone, and taraxerol), a flavonol (7,4’-dimethylkaempferol), a coumarin (scopoletin) and four phytosteroids (β-sitosterol, stigmasterol, β-sitosteryl-3-Oβ-D-glucop...

Spices play an important role in the chemoprevention and they can be a rich source of biologically active compounds such as triterpenes in the human diet. A method based on high performance thin-layer chromatography combined with densitometry for determination of ursolic and oleanolic acids in some common spices was elaborated. The prechromatographic derivatization with 1% of iodine solution wa...

Ganoderma lucidum and Ganoderma sinense, known as Lingzhi in Chinese, are commonly used Chinese medicines with excellent beneficial health effects. Triterpenes and polysaccharides are usually considered as their main active components. However, the content of triterpenes differs significantly between the two species of Ganoderma. To date, a careful comparison of polysaccharides from the two spe...

E. Wollenweber, K. Mann Institut für Botanik der Technischen Hochschule, Schnittspahnstraße 3, D-6100 Darmstadt, Bun­ desrepublik Deutschland F. J. Arriaga Departamento de Qufmica Orgänica, Universidad Autönoma, Madrid, Spain G. Yatskievych Department of Biology, Indiana University, Bloomington, Indiana, USA Z. Naturforsch. 40c, 321 — 324 (1985); received November 26, 1984/February 13, 1985 Plu...

The present study describes the leishmanicidal and trypanocidal activities of two quinonemethide triterpenes, maytenin (1) and pristimerin (2), isolated from Maytenus ilicifolia root barks (Celastraceae). The compounds were effective against the Trypanosomatidae Leishmania amazonensis and Leishmania chagasi and Trypanosoma cruzi, etiologic agents of leishmaniasis and Chagas' disease, respective...

Phytochemical investigation of the aerial parts of Euphorbia erythradenia Bioss. (Euphorbiaceae), one of Iranian endemic Euphorbias, with particular attention to triterpene constituents, using methanol solvent extraction was carried out. Five known triterpenes, including four cycloartanes and oleanolic acid, were isolated for the first time and identified using NMR and Mass techniques. Anti HIV...

against several kind of sickness including cancer, gastric ulcers, dyspepsia and also useful as an antibacterial and antiinflammatory. Sesquiterpenes, triterpenes, quinone-methide and sesquiterpene pyridine alkaloids have been identified in these species. Maytenus obtusifolia MART. is a plant found in many states of the Northeast and South-east of Brazil, which is used in traditional medicine f...

Structure-activity relationships of ursane-type pentacyclic triterpenes obtained from natural sources and by chemical derivatization are reviewed. Ursolic acid, corosolic acid, and a new ursane-type pentacyclic triterpene, 7,24-dihydroxyursolic acid, were isolated from the methanolic extract of the leaves of the Bangladeshi medicinal plant, Saurauja roxburghii. Derivatization of ursolic acid by...

The title compound, 0.897C(30)H(48)O(3).0.103C(30)H(47)O(2)F is a co-crystal of two triterpenes isolated from the resin of Canarium schweinfurthiiand Engl. Both triterpenes consists of four trans-fused rings having chair/half-chair/half-chair and envelope conformations. The mol-ecular conformations are stabilized by intra-molecular C-H⋯O hydrogen bonds, forming rings of S(7) graph-set motif. In...