title: The true identity of the triterpene component of Wyethia mollis, a lanosta-diene containing a tetrahydropyran E-ring.
abstract: The crystal structure of a triterpene component of Wyethia mollis has been obtained and compared with the previously reported structure of the compound. The compound in the crystal structure, lanosta-8,24-dien-3-one, 16,23-epoxy-(161beta, 23R), (1), is different from the previously reported compound, but has identical NMR and mass spectrometric data. The revised structure contains a tetrahydropyran E ring, a structural moiety rare in steroid triterpenes.
authors.affiliation: Department of Chemistry, The University of Tennessee at Chattanooga, 615 McCallie Ave., Chattanooga, TN 37403, USA.
authors.forename: Cole T
authors.initials: CT
authors.lastname: Smith
authors.forename: Bruice
authors.initials: B
authors.lastname: Noll
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Waddell
authors.forename: Kyle S
authors.initials: KS
authors.lastname: Knight
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D014315:Triterpenes