title: The sterols of Cucurbita moschata ("calabacita") seed oil.
abstract: From the sterol fraction of seed oil from commercial Cucurbita moschata Dutch ("calabacita") delta 5 and delta 7 sterols having saturated and unsaturated side chain were isolated by chromatographic procedures and characterized by spectroscopic (1H and 13C-nuclear magnetic resonance, mass spectrometry) methods. The main components were identified as 24S-ethyl 5 alpha-cholesta-7,22E-dien-3 beta-ol (alpha-spinasterol); 24S-ethyl 5 alpha-cholesta-7,22E,25-trien-3 beta-ol (25-dehydrochondrillasterol); 24S-ethyl 5 alpha-cholesta-7,25-dien-3 beta-ol; 24R-ethyl-cholesta-7-en-3 beta-ol (delta 7-stigmastenol) and 24-ethyl-cholesta-7, 24(28)-dien-3 beta-ol (delta 7,24(28)-stigmastadienol).
authors.affiliation: Departamento de Química Orgánica (Orientaciones Química Orgánica y Bromatología y Tecnología de Alimentos), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Argentina.
authors.forename: J B
authors.initials: JB
authors.lastname: Rodriguez
authors.forename: E G
authors.initials: EG
authors.lastname: Gros
authors.forename: M H
authors.initials: MH
authors.lastname: Bertoni
authors.forename: P
authors.initials: P
authors.lastname: Cattaneo
mesh_terms: D002851:Chromatography, High Pressure Liquid; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D010938:Plant Oils / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D013237:Stereoisomerism; D013261:Sterols / Q000032:analysis* / Q000737:chemistry
chemical_list: D010938:Plant Oils; D013261:Sterols