title: Naturally occurring 5-lipoxygenase inhibitors. VI. Structures of ardisiaquinones D, E, and F from Ardisia sieboldii.
abstract: New 1,4-benzoquinone derivatives, ardisiaquinones D(2), E(4), and F(5) along with the known ardisiaquinones A(1) and B(3) have been isolated from the leaves of Ardisia sieboldii (Myrsinaceae) and shown to be 5-lipoxygenase inhibitors. Their structures have been elucidated by spectroscopic analysis and chemical degradation. The degree of inhibition of 5-lipoxygenase activity by the ardisiaquinones and some derivatives of ardisiaquinone A is reported.
authors.affiliation: Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Fukuyama
authors.forename: Y
authors.initials: Y
authors.lastname: Kiriyama
authors.forename: M
authors.initials: M
authors.lastname: Kodama
authors.forename: H
authors.initials: H
authors.lastname: Iwaki
authors.forename: S
authors.initials: S
authors.lastname: Hosozawa
authors.forename: S
authors.initials: S
authors.lastname: Aki
authors.forename: K
authors.initials: K
authors.lastname: Matsui
mesh_terms: D000818:Animals; D016227:Benzoquinones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D016859:Lipoxygenase Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D009682:Magnetic Resonance Spectroscopy; D009504:Neutrophils / Q000187:drug effects / Q000201:enzymology; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D016227:Benzoquinones; D016859:Lipoxygenase Inhibitors; C096023:ardisiaquinone D; C096025:ardisiaquinone E; C096027:ardisiaquinone F