title: Two new C(13) nor-isoprenoids from the leaves of Casearia sylvestris.
abstract: Two new C(13) nor-isoprene glycosides, (6S,9S)-6,9-dihydroxymegastiman-4-en-9-O-beta-D-glucopyranoside (1) and (6S,9S)-6,9-dihydroxymegastiman-4-en-9-O-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (2) were isolated from the leaves of Casearia sylvestris, along with icariside B(5) (3), byzantionoside B (4), blumenol B (5), blumenol C (6) and loliolide (7). The structures of these compounds were determined on the basis of 1D and 2D NMR, MS and circular dichroism (CD) spectroscopic analyses, chemical methods and comparison with the literature data.
authors.affiliation: National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, University of Mississippi, MS 38677, U.S.A.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Xing-Cong
authors.initials: XC
authors.lastname: Li
authors.forename: Zulfiqar
authors.initials: Z
authors.lastname: Ali
authors.forename: Ikhlas Ahmed
authors.initials: IA
authors.lastname: Khan
mesh_terms: D001938:Brazil; D002236:Carbohydrate Conformation; D037821:Casearia / Q000737:chemistry*; D002849:Chromatography, Gas; D002942:Circular Dichroism; D005960:Glucosides / Q000737:chemistry*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018515:Plant Leaves / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: C541715:(6S,9S)-6,9-dihydroxymegastiman-4-en-9-O-beta-D-apiofuranosyl-(1-6)-beta-D-glucopyranoside; C541714:(6S,9S)-6,9-dihydroxymegastiman-4-en-9-O-beta-D-glucopyranoside; D005960:Glucosides; D013729:Terpenes