title: New oleanene and fernane-type triterpenes from the stem bark of Betula pendula roth.
abstract: A new oleanene-type triterpene, named betuloleanolic acid acetate and fernane-type triterpenes, namely betufernanediol A and betufernanediol B (isomers) have been isolated from the stem bark of Betula pendula. Their structures have been established as olean-12-en-3beta-ylacetate-29-oic acid, fern-22(29)-en-3beta,12beta-diol and fem-22(29)-en-3alpha,12beta-diol, respectively, on the basis of spectral data analysis and chemical reactions.
authors.affiliation: Faculty of Pharmacy, Jamia Hamdard (Hamdard University), Hamdard Nagar, New Delhi, India.
authors.forename: H M
authors.initials: HM
authors.lastname: Mukhtar
authors.forename: S H
authors.initials: SH
authors.lastname: Ansari
authors.forename: M
authors.initials: M
authors.lastname: Ali
authors.forename: T
authors.initials: T
authors.lastname: Naved
mesh_terms: D029662:Betula / Q000737:chemistry*; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D009828:Oleanolic Acid / Q000737:chemistry* / Q000302:isolation & purification; D024301:Plant Bark / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D012015:Reference Standards; D013055:Spectrophotometry, Infrared; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D007202:Indicators and Reagents; D014315:Triterpenes; D009828:Oleanolic Acid