2006•ARKIVOCOpen access

A novel D:A-friedooleanane triterpenoid and other constituents of the stem bark of Dichapetalum barteri Engl.

Ivan Addae‐Mensah, Sam Adu-Kumi, Reiner Waibel, Isaac V. Oppong

Abstract

A novel pentacyclic triterpenoid, 2β-hydroxy-3-oxo-D:A-friedoolenanan-29-oic acid has been isolated from the methanol extract of the stem bark of Dichapetalum barteri, and characterised by spectroscopic methods.Also reported for the first time from the plant are two lupane-type triterpenoids betulinic acid and betulonic acid, the friedelane triterpenoids syn:canophyllal, syn:canophyllol, friedelan-3-one and friedelan-3α-ol (epifriedelinol), the more common triterpenoids β-sitosterol and stigmasterol, as well as seven long chain esters of ferulic acid.

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Key concepts: Betulinic acid, Stigmasterol, Chemistry, Triterpenoid, Ferulic acid, Bark (sound), Organic chemistry, Stereochemistry