title: Trojanosides I-K: new cycloartane-type glycosides from the aerial parts of Astragalus trojanus.
abstract: Three new cycloartane-type triterpene glycosides have been isolated from the aerial parts of Astragalus trojanus. The structures were established mainly by a combination of one- and two-dimensional NMR techniques [1H-1H-correlation spectroscopy (COSY), 1H-13C-heteronuclear multiple quantum correlation spectroscopy (HMQC), and 1H-13C-heteronuclear multiple-bond correlation spectroscopy (HMBC)] and high resolution electrospray ionization mass spectrometry (HR-ESI-MS) as 3-O-beta-(2',3'-di-O-acetyl)-D-xylopyranosyl-6-O-beta-D-glucopyranosyl-16-O- acetoxy-20(R),24(S)-epoxycycloartane-3beta,6alpha,16beta,25-tetrol, 3-0-[alpha-L-rhamnopyranosyl-(1-->2)-beta-(3',4'-di-O-acetyl)-D-xylopyranosyll-6-O-beta-D-xylopyranosyl-20(R),24(S)-epoxycycloartane-3p,6alpha,16beta,25-tetrol, 3-O-beta-D-xylopyranosyl-6,16-di-O-beta-D-glucopyranosyl-20(R)24(S)-epoxycycloartane-3beta,6alpha,16beta,25-tetrol.
authors.affiliation: Hacettepe University, Faculty of Pharmacy, Department of Pharmacognosy, Ankara, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Bedir
authors.forename: I I
authors.initials: II
authors.lastname: Tatli
authors.forename: I
authors.initials: I
authors.lastname: Calis
authors.forename: I A
authors.initials: IA
authors.lastname: Khan
mesh_terms: D027883:Astragalus Plant / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018520:Plant Shoots / Q000737:chemistry; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes; C085352:cycloartane