title: Highly oxygenated ecdysteroids from Vitex canescens root bark.
abstract: Highly oxygenated ecdysteroids, (24R)-11 alpha, 20,24-trihydroxyecdysone and 11 alpha,20,26-trihydroxyecdysone, have been isolated from the polar fraction of Vitex canescens root bark. The latter exists as two C-25 epimers which could be separated by reversed-phase HPLC.
authors.affiliation: Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Huamark, Bangkok, Thailand.
authors.forename: A
authors.initials: A
authors.lastname: Suksamrarn
authors.forename: N
authors.initials: N
authors.lastname: Promrangsan
authors.forename: A
authors.initials: A
authors.lastname: Jintasirikul
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D026461:Ecdysteroids; D009682:Magnetic Resonance Spectroscopy; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013237:Stereoisomerism; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*; D020950:Vitex / Q000737:chemistry*
chemical_list: C412202:11,20,24-trihydroxyecdysone; C412203:11,20,26-trihydroxyecdysone; D026461:Ecdysteroids; D013256:Steroids