Triterpene Saponins from Wisteria floribunda “macrobotrys” and “rosea”

Abstract

Five oleanane-type saponins were isolated from two cultivars of Wisteria floribunda (Willd.) DC. (Fabaceae): From the roots of Wisteria floribunda “macrobotrys”, one new oleanane derivative elucidated as 3- O-β-D-xylopyranosyl-(1→2)-β-D-glucuronopyranosyl-22- O-acetyl-3p,22p,24-trihydroxyolean-12-en-30-oic acid, and two known glycosides, and from the roots of Wisteria floribunda “rosea”, two known ones. Their structures were elucidated by a detailed 600 MHz NMR analysis including 1D and 2D NMR (1H, 13C, COSY, TOCSY, ROESY, HSQC, HMBC) experiments and mass spectrometry. Chemotaxonomic conclusions were proposed.

Phytochemistry of Weigela x “kosteriana variegata” (Caprifoliaceae)

“…For spectroscopic and chromatographic data see ref [17]. Thin-layer chromatography (TLC, Silicycle) and high-performance thin-layer chromatography (HPTLC, Merck) were carried out on precoated silica gel plates 60F 254 , solvent system CHCl 3 /MeOH/H 2 O/AcOH 70:30:5:1.…”

Activation of a Sweet Taste Receptor by Oleanane-Type Glycosides from Wisteria sinensis

“…and Glycyrrhiza L. belong to the Faboideae subfamily, so they are phylogenetically very close [8]. Moreover, oleanane-type glycosides isolated from Wisteria species like W. frutescens [9], W. floribunda cultivars [10], and W. brachybotrys [11], showed some structural similarities with glycyrrhizin [12]: a β-carboxyl group at position C-30, a ketone function, and a 3-O-β-D-glucuronopyranosyl moiety.…”

Triterpenoid Saponins From the Stem Bark of Pentaclethra eetveldeana

“…3 Previous phytochemical studies on P. eetveldeana showed the presence of saponins in the seeds 4 with oleanolic acid or hederagenin as aglycone and glucose, rhamnose, and arabinose as sugar units. In a continuation of our studies on natural saponins from the plants of the Fabaceae family, 5,6 we decided to examine the saponins from the stem bark of P. eetveldeana De Wild. & Th.…”