title: Platelet aggregation inhibitors and inotropic constituents in Pyrolae herba.
abstract: The chloroform-soluble and n-butyl alcohol-soluble fractions of water extract of Pyrolae Herba inhibited platelet aggregation induced by arachidonic acid and showed a positive inotropic effect. A new naphthoquinone and a new tetralone derivative and known chimaphilin, acetovanillon, and toluhydroquinone were isolated as active constituents. Three new tetralone derivatives were also obtained from an active fraction. The structures of the new compounds were elucidated.
authors.affiliation: Shionogi Research Laboratories, Shionogi & Co., Ltd., Osaka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kagawa
authors.forename: K
authors.initials: K
authors.lastname: Tokura
authors.forename: K
authors.initials: K
authors.lastname: Uchida
authors.forename: H
authors.initials: H
authors.lastname: Kakushi
authors.forename: T
authors.initials: T
authors.lastname: Shike
authors.forename: H
authors.initials: H
authors.lastname: Nakai
mesh_terms: D000818:Animals; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D006168:Guinea Pigs; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*
chemical_list: D004365:Drugs, Chinese Herbal; D010975:Platelet Aggregation Inhibitors