An. De Gutierrez et al., Sesquiterpene lactones and other constituents of Disynaphia multicrenulatafrom Argentina, BIOCH SYST, 29(6), 2001, pp. 633-647
Flowers and leaves of Disynaphia multocrenulata from Argentina afforded a l
arge number of known germacradienolides and heliangolides, a new germacradi
enolide, 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 isoguaiagraz
ielolide. two diepoxygermacran-8,12-olides, three common kauranoic acids, p
inoresinol, jaceosidin and the sesquiterprne oplopanone. Structures were el
ucidated by high-field H-1 NMR spectrometry. The relationship to the known
chemistry of other members of the Disynaphiinae is discussed. (C) 2001 Else
vier Science Ltd. All rights reserved.