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Two guaianolides from cichorium pumilum

1984; Elsevier BV; Volume: 23; Issue: 1 Linguagem: Inglês

10.1016/0031-9422(84)83106-4

1873-3700

Sawsan El‐Masry, Nabila M. Ghazy, Christa Zdero, Ferdinand Bohlmann,

Traditional and Medicinal Uses of Annonaceae

The roots of Cichorium pumilum afforded two new guaianolides, 10β-hydroxyguaia-4,13-dien-6,12-olide and the corresponding 11β,13-dihydro derivative which could be separated only after transforming the methylene lactone into the corresponding pyrazoline. The structures were elucidated by 400 MHz 1H NMR spectroscopy. The chemotaxonomic situation is discussed briefly.