title: Novel cycloartane saponins from Corchorus depressus L.
abstract: Two novel bidesmosidic cycloartane-type glycosides, depressosides C and D were isolated from Corchorus depressus L. Their structures were elucidated as (22R)-16beta,22-epoxy-3beta,26-dihydroxy-9,19-cyclolanost-++ +24E-ene 3, 26-di-O-beta-D-glucopyranoside and (22R,24S)-22,25-epoxy-3beta,16beta,24-trihydroxy-9,19-cyclolano stane 3, 24-di-O-beta-glucopyranoside, respectively on the basis of chemical evidence and detailed spectroscopic studies.
authors.affiliation: International Center for Chemical Sciences, HEJ Research Institute of Chemistry University of Karachi, Pakistan. viqar@khi.comsats.net.pk
authors.forename: V U
authors.initials: VU
authors.lastname: Ahmad
authors.forename: A
authors.initials: A
authors.lastname: Ali
authors.forename: Z
authors.initials: Z
authors.lastname: Ali
authors.forename: F N
authors.initials: FN
authors.lastname: Zafar
authors.forename: M
authors.initials: M
authors.lastname: Zahid
mesh_terms: D002852:Chromatography, Ion Exchange; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D010154:Pakistan; D010936:Plant Extracts; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes
chemical_list: D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes; C421524:depressoside C; C421523:depressoside D