title: New stilbenoids from Pholidota yunnanensis and their inhibitory effects on nitric oxide production.
abstract: Six new stilbenoids, a (bibenzyldihydrophenanthrene) ether designated phoyunnanin D (1), a bis(dihydrophenanthrene) ether designated phoyunnanin E (2), and four stilbenes designated phoyunbene A-D (3-6), were isolated from the air-dried whole plant of Pholidota yunnanensis ROLFE. The new compounds were identified as 7-[2-(3-hydroxyphenethyl)-4-hydroxy-6-methoxyphenoxy]-4-hydroxy-2-methoxy-9,10-dihydrophenanthrene (1), 1-[(9,10-dihydro-4-hydroxy-2-methoxy-7-phenanthrenyl)oxy]-4,7-dihydroxy-2-methoxy-9,10-dihydrophenanthrene (2), trans-3,3'-dihydroxy-2',4',5-trimethoxystilbene (3), trans-3,4'-dihydroxy-2',3',5-trimethoxystilbene (4), trans-3,3'-dihydroxy-2',5-dimethoxystilbene (5), and trans-3-hydroxy-2',3',5-trimethoxystilbene (6) based on spectroscopic evidence. Furthermore, the inhibitory effects of compounds 1-6 on nitric oxide production in a murine macrophage-like cell line (RAW 264.7) activated by lipopolysaccharide and interferon-gamma were examined.
authors.affiliation: College of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, ShenheDistrict Shenyang, China.
authors.forename: Xiao-Yu
authors.initials: XY
authors.lastname: Guo
authors.forename: Jue
authors.initials: J
authors.lastname: Wang
authors.forename: Nai-Li
authors.initials: NL
authors.lastname: Wang
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitanaka
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Liu
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Yao
mesh_terms: D000818:Animals; D002460:Cell Line; D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid; D008264:Macrophages / Q000187:drug effects / Q000201:enzymology; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D009569:Nitric Oxide / Q000037:antagonists & inhibitors* / Q000096:biosynthesis*; D029595:Orchidaceae / Q000737:chemistry*; D010616:Phenanthrenes / Q000737:chemistry* / Q000302:isolation & purification; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013267:Stilbenes / Q000737:chemistry* / Q000302:isolation & purification; D013778:Tetrazolium Salts; D013844:Thiazoles
chemical_list: D010616:Phenanthrenes; D013267:Stilbenes; D013778:Tetrazolium Salts; D013844:Thiazoles; D009569:Nitric Oxide; C022616:thiazolyl blue