title: Coumarins with monoamine oxidase inhibitory activity and antioxidative coumarino-lignans from Hibiscus syriacus.
abstract: A previously undescribed coumarin and a new coumarino-lignan, together with the known compounds scopoletin and cleomiscosins A, C, and D, have been isolated from the root bark of Hibiscus syriacus, and their structures were assigned on the basis of various spectral studies. The coumarin analogue and scopoletin inhibited monoamine oxidase with moderate IC(50) values. The new coumarino-lignan and cleomiscosin C showed lipid peroxidation inhibitory activity comparable to vitamin E.
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusong, Taejon 305-600, Korea.
authors.forename: B S
authors.initials: BS
authors.lastname: Yun
authors.forename: I K
authors.initials: IK
authors.lastname: Lee
authors.forename: I J
authors.initials: IJ
authors.lastname: Ryoo
authors.forename: I D
authors.initials: ID
authors.lastname: Yoo
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004146:Dioxanes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D066298:In Vitro Techniques; D020128:Inhibitory Concentration 50; D007723:Korea; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015227:Lipid Peroxidation / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D019660:Malvaceae / Q000737:chemistry*; D051379:Mice; D008862:Microsomes, Liver / Q000187:drug effects; D015394:Molecular Structure; D008996:Monoamine Oxidase Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D051381:Rats; D012603:Scopoletin / Q000494:pharmacology; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship; D014810:Vitamin E / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D003374:Coumarins; D004146:Dioxanes; D017705:Lignans; D008996:Monoamine Oxidase Inhibitors; C438427:cleomiscosin C; C438426:cleomiscosin D; D014810:Vitamin E; C041934:cleomiscosin A; D012603:Scopoletin