title: Pregnanes and pregnane glycosides from Marsdenia roylei.
abstract: Two pregnanes namely desacylkondurangogenin C (1) and deniagenin (3, new) and two new pregnane glycosides designated as denin (5) and marsin (12) have been isolated from chloroform soluble extract of dried stem of Marsdenia roylei. Chemical and spectroscopic evidences are consistent with the structures of deniagenin, denin and marsin as 3beta, 11alpha, l2beta, 14beta, 17beta, 20-hexahydroxy pregn-5-ene; desacylkondurangogenin C-3-O-alpha-D-glucopyranosyl-(1-->4)-O-alpha-L-fucopyranoside and ketocalogenin-3-O-alpha-L-fucopyranoside, respectively.
authors: Department of Chemistry, Lucknow University, -226 007, Lucknow, India.
authors: Vijay S
authors: VS
authors: Gupta
authors: Alok
authors: A
authors: Kumar
authors: Desh
authors: D
authors: Deepak
authors: Anakshi
authors: A
authors: Khare
authors: Naveen K
authors: NK
authors: Khare
mesh_terms: D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D031101:Marsdenia / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D011278:Pregnanes / Q000737:chemistry* / Q000302:isolation & purification*; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D011278:Pregnanes