title: Antioxidant compounds from ethanol extracts of bamboo (Neosinocalamus affinis) leaves.
abstract: Activity-guided fractionation of Neosinocalamus affinis leaves led to obtain two new flavonoids, 4'-O-((7″R,8″S)-8″-guaiacylglyceryl)-pleioside B (9) and apigenin 6-C-β-d-fucopyranosyl-7-O-β-d-glucopyranoside (10) along with eight known compounds. Their structures were elucidated on the basis of spectroscopic data (UV, IR, NMR, and MS). Among these 10 compounds, farobin A (4) and isoorientin (7) showed significant antioxidant activity evaluated by 1,1-diphenyl-2-picrylhydrazyl, 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid), superoxide anion and nitric oxide (NO) radical-scavenging assays.
authors.affiliation: a Chengdu Institute of Biology, Chinese Academy of Sciences , Chengdu 610041 , China.
authors.forename: Guo-Yong
authors.initials: GY
authors.lastname: Luo
authors.forename: Ying-Gang
authors.initials: YG
authors.lastname: Luo
authors.forename: Rong
authors.initials: R
authors.lastname: Zhou
authors.forename: Min
authors.initials: M
authors.lastname: Zhou
authors.forename: Jian
authors.initials: J
authors.lastname: Gu
authors.forename: Qi
authors.initials: Q
authors.lastname: Ye
authors.forename: Ya
authors.initials: Y
authors.lastname: Dai
authors.forename: Guo-Lin
authors.initials: GL
authors.lastname: Zhang
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000494:pharmacology; D000431:Ethanol; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000737:chemistry; D015394:Molecular Structure; D010851:Picrates / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D031787:Sasa / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry; D013481:Superoxides / Q000032:analysis
chemical_list: C000598445:4'-O-((7'R,8'S)-8'-guaiacylglyceryl)-pleioside B; D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D005419:Flavonoids; D016166:Free Radical Scavengers; D010851:Picrates; D013451:Sulfonic Acids; C000598446:apigenin 6-C-beta-D-fucopyranosyl-7-O-beta-D-glucopyranoside; D013481:Superoxides; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; D000431:Ethanol; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: ABTS; DPPH; Neosinocalamus affinis; nitric oxide; radical-scavenging effect; superoxide anion