title: Leptocarposide: a new triterpenoid glycoside from Ludwigia leptocarpa (Onagraceae).
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 ((1)H and (13)C NMR, (1)H-(1)H 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.
authors.affiliation: Faculty of Science, Department of Chemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon.
authors.forename: Florence Déclaire
authors.initials: FD
authors.lastname: Mabou
authors.forename: Perrin Lanversin Foning
authors.initials: PL
authors.lastname: Tebou
authors.forename: David
authors.initials: D
authors.lastname: Ngnokam
authors.forename: Dominique
authors.initials: D
authors.lastname: Harakat
authors.forename: Laurence
authors.initials: L
authors.lastname: Voutquenne-Nazabadioko
mesh_terms: D003198:Computer Simulation; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D029594:Onagraceae / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D011522:Protons; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D011522:Protons; D014315:Triterpenes
keywords: 13C NMR; 1H NMR; 2D NMR; Ludwigia leptocarpa; NMR; NMR complete assignments; Onagraceae; bidesmoside; leptocarposide; triterpenoid glycoside