Structure elucidation of olasubscorpioside C, a new rotameric biflavonoid glycoside from the stem barks of Olax subscorpioidea (Oliv)

Author:

Tsakem Bienvenu1,Toussie Billy Tchegnitegni12,Siwe‐Noundou Xavier3ORCID,Ponou Beaudelaire Kemvoufo1,Teponno Rémy Bertrand1ORCID,Musharraf Syed Ghulam2,Tapondjou Leon Azefack1

Affiliation:

1. Department of Chemistry, Faculty of Science University of Dschang Dschang Cameroon

2. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan

3. Department of Pharmaceutical Sciences, School of Pharmacy Sefako Makgatho Health Sciences University Pretoria South Africa

Abstract

AbstractFrom the n‐butanol soluble fraction of the ethanol extract of the medicinal plant Olax subscorpioidea, a previously unreported rotameric biflavonoid glycoside constituted of 4′‐O‐methylgallocatechin‐(4α → 8)‐4′‐O‐methylgallocatechin as aglycone named olasubscorpioside C (1) along with the known 4′‐O‐methylgallocatechin (2) were isolated. Their structures were determined on the basis of spectrometric and spectroscopic techniques including HRFABMS, 1H and 13C NMR, DEPT 135o, HSQC, HMBC, ROESY, and CD followed by comparison with the reported data.

Funder

Alexander von Humboldt-Stiftung

The World Academy of Sciences

Publisher

Wiley

Subject

General Materials Science,General Chemistry

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