title: Free radical scavengers from the heartwood of Juniperus chinensis.
abstract: The antioxidant activity of Juniperus chinensis (Cupressaceae) was determined by measuring the radical scavenging effect on DPPH (1,1-diphenyl-2-picrylhydrazyl). The methanolic extract of J. chinensis heartwood showed the strong antioxidant activity. The antioxidant activity of n-BuOH soluble fraction was stronger than that of the others, and the fraction was subjected to purification by repeated silica gel and Sephadex LH-20 column chromatography. Quercetin, naringenin, taxifolin, aromadendrin and isoquercitrin were isolated from the n-BuOH fraction. Their structures were elucidated by physico-chemical and spectroscopic studies.
authors.affiliation: College of Pharmacy, Woosuk University, Samrye, Korea.
authors.forename: Jong Pil
authors.initials: JP
authors.lastname: Lim
authors.forename: Young Cheol
authors.initials: YC
authors.lastname: Song
authors.forename: Jin Wook
authors.initials: JW
authors.lastname: Kim
authors.forename: Chung Hwan
authors.initials: CH
authors.lastname: Ku
authors.forename: Jae Soon
authors.initials: JS
authors.lastname: Eun
authors.forename: Kang Hyun
authors.initials: KH
authors.lastname: Leem
authors.forename: Dae Keun
authors.initials: DK
authors.lastname: Kim
mesh_terms: D001713:Biphenyl Compounds; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D016166:Free Radical Scavengers / Q000302:isolation & purification* / Q000494:pharmacology*; D007202:Indicators and Reagents; D018653:Juniperus / Q000737:chemistry*; D007723:Korea; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014934:Wood
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D007202:Indicators and Reagents; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl