title: Phaeolschidins A-E, five hispidin derivatives with antioxidant activity from the fruiting body of Phaeolus schweinitzii collected in the Tibetan Plateau.
abstract: Five new hispidin derivatives, phaeolschidins A-E (1-5), as well as two known natural products, pinillidine (6) and hispidin (7), were isolated from the fruiting bodies of Phaeolus schweinitzii collected in the Tibetan Plateau. The structures of the new compounds were elucidated by spectroscopic methods. Phaeolschidins A-D (1-4) are new bishispidins. Phaeolschidin E (5) is a new class of hispidin derivative in which one pyrrolidin-2-one moiety was linked to C-3 of hispidin. The antioxidant activity of 1-7 was evaluated using three methods: the DPPH scavenging assay, the total antioxidant capacity assay, and the lipid peroxidation assay. Hispidin showed the strongest antioxidant activity of all tested compounds. This is the first report of secondary metabolites from the fungus P. schweinitzii.
authors.affiliation: State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 9 Beiertiao, Zhongguancun, Haidian District, Beijing 100190, People's Republic of China.
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Han
authors.forename: Li
authors.initials: L
authors.lastname: Bao
authors.forename: Lu-Wei
authors.initials: LW
authors.lastname: He
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Zhang
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Yang
authors.forename: Shao-Jie
authors.initials: SJ
authors.lastname: Li
authors.forename: Yi-Jian
authors.initials: YJ
authors.lastname: Yao
authors.forename: Hong-wei
authors.initials: HW
authors.lastname: Liu
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D001713:Biphenyl Compounds / Q000494:pharmacology; D048690:Fruiting Bodies, Fungal / Q000737:chemistry; D015227:Lipid Peroxidation; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010851:Picrates / Q000494:pharmacology; D011753:Pyrones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D018609:Tibet
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D010851:Picrates; D011753:Pyrones; C004931:1,1-diphenyl-2-picrylhydrazyl; C007946:hispidin