Melantheraside A–E, five original triterpenes with natural chloride or oxime group from the aerial parts of Melanthera elliptica O. Hoffm. - Université de Reims Champagne-Ardenne Accéder directement au contenu
Article Dans Une Revue Phytochemistry Letters Année : 2018

Melantheraside A–E, five original triterpenes with natural chloride or oxime group from the aerial parts of Melanthera elliptica O. Hoffm.

Résumé

Five new pentacyclic triterpenoids, Melantheraside A–E (1–5) together with eleven known compounds (6-16) were isolated from the methanol extract of the aerial parts of Melanthera elliptica O. Hoffm. Their structures were established by extensive analysis of 1D- (1H, 13C), 2D- (COSY, ROESY, HSQC and HMBC) NMR data experiments in conjunction with mass spectrometry (TOFESIMS and HR-TOFESIMS) and by comparison with data reported in the literature. The structures of the new compounds were established as: 12α-chloro-3β-hydroxyoleanan-28,13β-olide (1), 3β-acetoxy-12α-hydroxytaraxer-14-en-28-oic acid (2), 3β-hydroxy-12-oximetaraxeran-28,14β-olide (3), 3β-acetoxy-12-oximetaraxeran-28,14β-olide (4) and 2β-carboxyamino-12α-chloro-3-oxo-1-nor-oleanan-28,13β-olide (5). The 3β-acetoxy-12α-chloro-oleanan-28,13β-olide (6) was isolated for the first time as natural product.
Fichier principal
Vignette du fichier
Draft 2nd Article Cyrille _HAL.pdf (688.52 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01996059 , version 1 (22-09-2021)

Identifiants

Citer

Cyrille Ngoufack Tagousop, David Ngnokam, Dominique Harakat, Laurence Voutquenne-Nazabadioko. Melantheraside A–E, five original triterpenes with natural chloride or oxime group from the aerial parts of Melanthera elliptica O. Hoffm.. Phytochemistry Letters, 2018, 26, pp.38-43. ⟨10.1016/j.phytol.2018.05.007⟩. ⟨hal-01996059⟩
48 Consultations
68 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More