title: 1 alpha,20R-dihydroxyecdysone from Axyris amaranthoides.
abstract: Bioassay/RIA-directed phytochemical examination of the seeds of Axyris amaranthoides afforded a new ecdysteroid: 1 alpha,20R-dihydroxyecdysone [1-epi-integristerone A], together with 20-hydroxyecdysone and polypodine B. The structure of 1 alpha,20R-dihydroxyecdysone was determined unequivocally by UV, LSIMS, and a combination of 1D and 2D NMR techniques.
authors.affiliation: Department of Biological Sciences, University of Exeter, Hatherly Laboratories, Devon, U.K.
authors.forename: S D
authors.initials: SD
authors.lastname: Sarker
authors.forename: V
authors.initials: V
authors.lastname: Sik
authors.forename: H H
authors.initials: HH
authors.lastname: Rees
authors.forename: L
authors.initials: L
authors.lastname: Dinan
mesh_terms: D004440:Ecdysone / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010944:Plants / Q000737:chemistry*; D011863:Radioimmunoassay; D018629:Spectrometry, Mass, Secondary Ion / Q000379:methods; D013056:Spectrophotometry, Ultraviolet
chemical_list: C116943:1,20-hydroxyecdysone; D004440:Ecdysone