title: Puqiedinone, a novel 5 alpha-cevanine alkaloid from the bulbs of Fritillaria puqiensis, an antitussive traditional Chinese medicine.
abstract: A novel 5 alpha-cevanine alkaloid, puqiedinone [1], was isolated from the bulbs of Fritillaria puqiensis, a traditional Chinese medicine used widely for its antitussive and expectorant properties. The structure of 1 was assigned as (20R,22S,25R)-20-deoxy-5 alpha-cevanine-3 beta-ol-6-one based on spectral analysis and comparison with the structures of related known compounds. Puqietinone [2] was also identified from the same herbal plant and the structure was revised as (22R,25S)-N-methyl-22,26-epiminocholest-3 beta-ol-6-one based on spectroscopic and X-ray crystallographic methods.
authors.affiliation: Department of Pharmacology, Chinese University of Hong Kong, Shatin, N.T., Hong Kong.
authors.forename: G
authors.initials: G
authors.lastname: Lin
authors.forename: Y P
authors.initials: YP
authors.lastname: Ho
authors.forename: P
authors.initials: P
authors.lastname: Li
authors.forename: X G
authors.initials: XG
authors.lastname: Li
mesh_terms: D000996:Antitussive Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002595:Cevanes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D018517:Plant Roots / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D000996:Antitussive Agents; D002595:Cevanes; D004365:Drugs, Chinese Herbal; C069537:sinpeinine A