title: Androstane and withanolides from Physalis cinerascens.
abstract: Two new withanolides, cinerolide and 24,25-dihydrowithanolide S, together with the new androstane, cinedione, and the known withanolides, visconolide, physalactone, withanolide S and 4beta-hydroxywithanolide E were isolated from the EtOAc extract of leaves, flowers and stems of Physalis cinerascens. The structures of these compounds were established by spectroscopic methods and that of cinerolide was confirmed by X-ray diffraction analysis.
authors.affiliation: Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, México. emmamaldonado@correo.unam.mx
authors.forename: Emma
authors.initials: E
authors.lastname: Maldonado
authors.forename: Vita E
authors.initials: VE
authors.lastname: Alvarado
authors.forename: Fernando R
authors.initials: FR
authors.lastname: Torres
authors.forename: Mahinda
authors.initials: M
authors.lastname: Martínez
authors.forename: Ana L
authors.initials: AL
authors.lastname: Pérez-Castorena
mesh_terms: D000731:Androstanes / Q000737:chemistry; D018360:Crystallography, X-Ray; D004875:Ergosterol / Q000031:analogs & derivatives / Q000737:chemistry; D035264:Flowers; D006801:Humans; D032321:Physalis; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves; D018547:Plant Stems
chemical_list: D000731:Androstanes; D010936:Plant Extracts; C033936:androstane; D004875:Ergosterol