Sesquiterpene lactones from Centaurea tweediei.
Aerial parts of Centaurea tweediei from Argentina afforded as the main constituent the sesquiterpene lactone onopordopicrin and minor amounts of a new heliangolide, a new guaianolide, a new eudesmanolide, a new eudesmane acid and the lignans arctigenin and matairesinol.
Fortuna
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Instituto de Química Orgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 491, 4000 S. M. de, Tucumán, Argentina
de Riscala
E C.
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Catalan
C A.N.
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Gedris
T E.
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Herz
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