Kaurane-Type Diterpenes from Fern Frond Exudates
Open Access
- 1 December 1989
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 44 (11-12) , 901-904
- https://doi.org/10.1515/znc-1989-11-1204
Abstract
The viscid exudate found on fronds of the fern, Cheilanthes kaulfussii, consists of terpenoids in which flavonoid aglycones are dissolved. One of the terpenes is shown to be em-kaur-16-en-19-oic acid. The farinose frond exudate of Notholaena pallens contains this acid as the major constituent and its 3 R-hydroxy derivative, together with flavonoid aglycones as minor components. In N.incana, two of the diterpenes that form the farinose exudate along with flavonoid aglycones have been identified as 16R-ent-kauran-17-oic acid and 16R,17-dihydroxy-3-oxo-ent-kaurane (abbeo-kutone).Keywords
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