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Exploring the Chemical Diversity of Algerian Plants: Three New Pentacyclic Triterpenoids from Launaea acanthoclada Roots.

ABSTRACT: The chemical study of Launaea acanthoclada from South-East Algeria led to the isolation of twelve oxygenated terpenoid compounds, including three new pentacyclic triterpenoids 1-3 with either lupane or ursane rearranged skeletons. The structure and the stereochemistry of these compounds were established by spectroscopic methods, including NMR techniques. The chemical pattern of L. acanthoclada is in accordance with the triterpenoid scenario of the genus Launaea embracing to date lupane, oleane, ursane and taraxastane skeletons. However, the carbon frameworks exhibited by new compounds 1-3 have never been reported from Launaea species.

SUBMITTER: Zergainoh N 

PROVIDER: S-EPMC6017627 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Exploring the Chemical Diversity of Algerian Plants: Three New Pentacyclic Triterpenoids from Launaea acanthoclada Roots.

Zergainoh Nabila N   Ciavatta Maria Letizia ML   Carbone Marianna M   Bitam Fatma F   Aberkane Mohamed Cherif MC   Gavagnin Margherita M  

Molecules (Basel, Switzerland) 20171230 1

The chemical study of <i>Launaea acanthoclada</i> from South-East Algeria led to the isolation of twelve oxygenated terpenoid compounds, including three new pentacyclic triterpenoids <b>1</b>-<b>3</b> with either lupane or ursane rearranged skeletons. The structure and the stereochemistry of these compounds were established by spectroscopic methods, including NMR techniques. The chemical pattern of <i>L. acanthoclada</i> is in accordance with the triterpenoid scenario of the genus <i>Launaea</i>  ...[more]

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