Critical survey of a selected class of pentacyclic triterpenes--the oleanane family, is presented based on current literature in order to underline their value for medicinal chemistry and drug development potential. Oleanenes may be considered as a renewable resource of valuable research materials which are structurally diverse, inherently biocompatible and have built-in affinity for many categ...

Natural products derived from plants have been used for decades in traditional medicine. Many classes of compounds exist such as saponins, alkaloids, anti-oxidants, etc. Pentacyclic triterpenes are also one the occurring plants. In this class Ursolic acid is a well-recognized compound that available various sources like seeds well fruits and possess many types activities bright contender develo...

Propolis is a hive product containing chiefly beeswax and plant-derived substances such as resin and volatile compounds. Propolis has been used as an antiseptic and wound healer since ancient times and interest for the product has increased recently. Probably few plant species contribute as major resin sources. Green propolis derives mainly from vegetative apices of Baccharis dracunculifolia (a...

A new and rare ergostane triterpenoid, 4alpha-methyl-3alpha,4beta-dihydroxy-ergost-8,24(28)-dien-7,11-dion-25-al (1), was isolated from cultures of the basidiomycete Inocybe lilacina, and its structure established on the basis of spectral methods (MS, IR, 1D and 2D NMR).

Um novo triterpeno, 3β,22ξ,23ξ-triidróxi-22ξ-acetóxi-24-metil-lanosta-8,24(28)-dieno-31-al, denominado pisosteral, e quatro triterpenos lanostanos conhecidos, 3β,22ξ,23ξ-triidróxi-22ξ-acetóxi24-metil-lanosta-8,24(28)-dieno (pisosterol), 3α,22ξ,23ξ-triidróxi-22ξ-acetóxi-24-metil-lanosta8,24(28)-dieno (3-epi-pisosterol), 3β,22ξ,23ξ-triidróxi-23ξ-acetóxi-24-metil-lanosta-8,24(28)-dieno e 3β,22ξ,23...

Four new ursane-type triterpenes, 3beta-acetoxy-11alpha-methoxy-12-ursene (1), 3beta-acetoxy-11alpha-ethoxy-12-ursene (2), 3beta-acetoxy-11alpha-hydroperoxy-12-ursene (3), 3beta-hydroxy-11alpha-hydroperoxy-12-ursene (4), and two new oleanane-type triterpenes, 3beta-acetoxy-11alpha-ethoxy-12-oleanene (5), 3beta-acetoxy-111alpha-hydroperoxy-12-oleanene (6), together with 3beta-acetoxy-11alpha-hyd...

Triterpenoid saponins isolated and identified from natural resources during the period April, 2007-December, 2012 are reviewed. Current techniques used in their isolation and structure determination are discussed. New triterpenoid saponins isolated along with their occurrence, selected physical data, spectroscopic methods used for their identification and the 13C NMR data of the novel aglycones...

distance-balanced graphs are introduced as graphs in which every edge uv has the followingproperty: the number of vertices closer to u than to v is equal to the number of vertices closerto v than to u. basic properties of these graphs are obtained. in this paper, we study theconditions under which some graph operations produce a distance-balanced graph.

Protium is the main genus of the Burseraceae family and one of the most common genera in South America, with an important species called "breu." Gum and oil-resins of this species are used as tonic and stimulant and for the treatment of ulcers and inflammation. The present study aims to isolate and investigate the anti-inflammatory activity of triterpene compounds isolated from oil-resin of Pro...