title: Absolute stereostructures of trifoliones A, B, C, and D, new biologically active diterpenes from the tuber of Sagittaria trifolia L.
abstract: Four new biologically active diterpenes, trifoliones A, B, C, and D, were isolated from the tuber of Sagittaria trifolia L. together with three new glycosides, sagittariosides a and b and arabinothalictoside. Their stereostructures were determined on the basis of chemical and physicochemical evidence which included the application of a modified Mosher's method and an exciton chirality method. Trifoliones A, B, C, and D exhibited inhibitory effects on the histamine release from rat mast cells induced by compound 48/80 or calcium ionophore A-23187.
authors.affiliation: Kyoto Pharmaceutical University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yoshikawa
authors.forename: S
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: T
authors.initials: T
authors.lastname: Murakami
authors.forename: H
authors.initials: H
authors.lastname: Matsuda
authors.forename: J
authors.initials: J
authors.lastname: Yamahara
authors.forename: N
authors.initials: N
authors.lastname: Murakami
mesh_terms: D000818:Animals; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D006636:Histamine Release / Q000187:drug effects*; D066298:In Vitro Techniques; D008407:Mast Cells / Q000187:drug effects / Q000378:metabolism; D015394:Molecular Structure; D010944:Plants / Q000737:chemistry*; D051381:Rats
chemical_list: D004224:Diterpenes