title: Chemical Constituents of the Rhizomes of Bletilla formosana and Their Potential Anti-inflammatory Activity.
abstract: Nine new phenanthrenes (1-9) and a new benzyl glycoside (10) together with 45 known compounds were isolated from the rhizomes of Bletilla formosana. The structures of 1-10 were elucidated primarily on the basis of their 1D and 2D NMR spectroscopic data. Most of the isolated compounds were evaluated for their anti-inflammatory activities. The results showed that IC50 values for the inhibition of superoxide anion generation and elastase release ranged from 0.2 to 6.5 μM and 0.3 to 5.7 μM, respectively. Structure-activity relationships of the isolated compounds were also investigated. The inhibitory potencies were determined as phenanthrenes > bibenzyls > biphenanthrenes.
authors.affiliation: Department of Chemistry National Cheng Kung University , Tainan 70101, Taiwan.
authors.forename: Che-Wei
authors.initials: CW
authors.lastname: Lin
authors.affiliation: Graduate Institute of Natural Products, Chang Gung University , Taoyuan 33302, Taiwan.|Research Center for Industry of Human Ecology and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology , Taoyuan 333, Taiwan.|Department of Anesthesiology, Chang Gung Memorial Hospital , Taoyuan 333, Taiwan.
authors.forename: Tsong-Long
authors.initials: TL
authors.lastname: Hwang
authors.affiliation: Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University , Pingtung 90741, Taiwan.
authors.forename: Fu-An
authors.initials: FA
authors.lastname: Chen
authors.affiliation: Department of Biological Science and Technology, Chung Hwa University of Medical Technology , Tainan 71703, Taiwan.
authors.forename: Chia-Hsin
authors.initials: CH
authors.lastname: Huang
authors.affiliation: School of Pharmacy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan 70101, Taiwan.
authors.forename: Hsin-Yi
authors.initials: HY
authors.lastname: Hung
authors.affiliation: Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University , Pingtung 90741, Taiwan.|School of Pharmacy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan 70101, Taiwan.
authors.forename: Tian-Shung
authors.initials: TS
authors.lastname: Wu
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D001632:Bibenzyls / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D029595:Orchidaceae / Q000737:chemistry*; D010196:Pancreatic Elastase / Q000187:drug effects / Q000378:metabolism; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D027343:Rhizome / Q000737:chemistry*; D013329:Structure-Activity Relationship; D013481:Superoxides / Q000737:chemistry; D013624:Taiwan
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D001632:Bibenzyls; D010616:Phenanthrenes; D013481:Superoxides; D010196:Pancreatic Elastase