title: Dihydrophenanthrenes from Bletilla formosana.
abstract: Three new dihydrophenanthrenes, 4-methoxy-9,10-dihydrophenanthrene-1,2,7-triol (1), 1-(4-hydroxybenzyl)-4,7-dimethoxy-9,10-dihydrophenanthrene-2-ol (2), and 1,3,6-tri(4-hydroxybenzyl)-4-methoxydihydrophenanthrene-2,7-diol (3) together with seven known phenanthrene derivatives, six known flavonoids, a bibenzyl and three phenolic compounds were isolated from the whole plant of Bletilla formosana. Their structures were elucidated by spectroscopic, mainly 2D NMR spectrometry and chemical methods.
authors.affiliation: National Research Institute of Chinese Medicine; Taipei 112, Taiwan. yllin@cma23.nricm.edu.tw
authors.forename: Yun-Lian
authors.initials: YL
authors.lastname: Lin
authors.forename: Wan-Ping
authors.initials: WP
authors.lastname: Chen
authors.forename: Abdulgafor Datu
authors.initials: AD
authors.lastname: Macabalang
mesh_terms: D000107:Acetylation; D001593:Benzyl Compounds / Q000138:chemical synthesis* / Q000302:isolation & purification; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D029595:Orchidaceae / Q000737:chemistry*; D010616:Phenanthrenes / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013624:Taiwan
chemical_list: C505001:1,3,6-tri(4-hydroxybenzyl)-4-methoxydihydrophenanthrene-2,7-diol; C505000:1-(4-hydroxybenzyl)-4,7-dimethoxy-9,10-dihydrophenanthrene-2-ol; C504999:4-methoxy-9,10-dihydrophenanthrene-1,2,7-triol; D001593:Benzyl Compounds; D007202:Indicators and Reagents; D010616:Phenanthrenes; D010936:Plant Extracts