Leptocarposide: a new triterpenoid glycoside from Ludwigia leptocarpa (Onagraceae) |
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| Authors: | Florence Déclaire Mabou Perrin Lanversin Foning Tebou David Ngnokam Dominique Harakat Laurence Voutquenne‐Nazabadioko |
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| Institution: | 1. Faculty of Science, Department of Chemistry, University of Dschang, , Dschang, Cameroon;2. Service Commun d'Analyses, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, , 51687 Reims Cedex 2, France;3. Groupe Isolement et Structure, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, , 51687 Reims Cedex 2, France |
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| Abstract: | A new triterpenoid bidesmoside (leptocarposide) possessing an acyl group in their glycosidic moiety (1), together with the known luteolin‐8‐C‐glucoside (2) and 1‐O‐β‐d ‐glucopyranosyl‐(2S,3R,8E)‐2‐(2′R)‐2‐hydroxypalmitoylamino]‐8‐octadecen‐1,3‐diol (3) was isolated from the n‐butanol‐soluble fraction of whole plant of Ludwigia leptocarpa (Nutt) Hara (Onagraceae). Structure of compound 1 has been assigned on the basis of spectroscopic data (1H and 13C NMR, 1H‐1H COSY, HSQC, HMBC, and ROESY), mass spectrometry, and by comparison with the literature. This compound was further screened for its potential antioxidant properties by using the radical scavenging assay model 2,2‐diphenyl‐1‐picrylhydrazyl and reveals non‐potent antioxidant activities, while compound 2 shows SC50 of 0,038 mM. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | NMR 1H NMR 13C NMR 2D NMR Ludwigia leptocarpa Onagraceae triterpenoid glycoside bidesmoside leptocarposide NMR complete assignments |
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