title: Sesquiterpene lactones and other constituents of Disynaphia multicrenulata from Argentina.
abstract: Flowers and leaves of Disynaphia multicrenulata from Argentina afforded a large number of known germacradienolides and heliangolides, a new germacradienolide, a known melampolide, a new parthenolide derivative, one known and seven new cronquistiolides, a new 4Z-melampolide, three known and five new eudesmanolides, a new elemadienolide, a known grazielolide, an isoguaiagrazielolide, two diepoxygermacran-8,12-olides, three common kauranoic acids, pinoresinol, jaceosidin and the sesquiterpene oplopanone. Structures were elucidated by high-field 1H NMR spectrometry. The relationship to the known chemistry of other members of the Disynaphiinae is discussed.
authors.affiliation: Instituto de Química Orgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 491, 4000, S. M. de Tucumán, Argentina
authors.forename: A N.
authors.initials: AN
authors.lastname: de Gutierrez
authors.forename: A
authors.initials: A
authors.lastname: Bardón
authors.forename: C A.N.
authors.initials: CA
authors.lastname: Catalán
authors.forename: T B.
authors.initials: TB
authors.lastname: Gedris
authors.forename: W
authors.initials: W
authors.lastname: Herz