title: Neolignans from Piper futokadsura and their inhibition of nitric oxide production.
abstract: From a MeOH extract of the aerial part of Piper futokadsura, the tetrahydrofuran lignans, futokadsurin A [(7S,8S,7'S,8'R)-3,4,3'-trimethoxy-4'-hydroxy-7,7'-epoxylignan], futokadsurin B [(7R,8R,7'R,8'S)-3,4-dimethoxy-3',4'-methylenedioxy-7,7'-epoxylignan], and futokadsurin C [(7R,8R,7'S,8'S)-3,4-methylenedioxy-3',4'-dimethoxy-7,7'-epoxylignan] were isolated, together with nine known neolignans. In addition, L-tryptophan, pellitorine, phytol, elemicin, and 1,2,4-trimethoxyphenyl-5-aldehyde were isolated. The structures of the new compounds were elucidated using spectroscopic methods. These lignans inhibited nitric oxide production by a murine macrophage-like cell line (RAW 264.7), which was activated by lipopolysaccharide and interferon-gamma.
authors.affiliation: Kyoto Pharmaceutical University, Kyoto, Japan. konishi@mb.kyoto-phu.ac.jp
authors.forename: Tenji
authors.initials: T
authors.lastname: Konishi
authors.forename: Takao
authors.initials: T
authors.lastname: Konoshima
authors.forename: Akihiro
authors.initials: A
authors.lastname: Daikonya
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitanaka
mesh_terms: D000818:Animals; D002460:Cell Line; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D051379:Mice; D009569:Nitric Oxide / Q000037:antagonists & inhibitors* / Q000096:biosynthesis*; D031701:Piper; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D017705:Lignans; D010936:Plant Extracts; D009569:Nitric Oxide