Diterpenes from the leaf exudate of Psiadia punctulata

Two known diterpenes, ( ent)-2-oxokaur-16-en-18,19-diol (psiadin) and ( ent)-kaur-16-en-2α,18,19-triol, and three novel diterpenes, ( ent)-16 β,17-dihydroxykauran-20-oic acid, 2-oxotrachyloban-18,19-diol and trachyloban-2β,6β,19-triol have been isolated from the leaf exudate of Psiadia punctulata. T...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 1997-05, Vol.45 (1), p.117-120
Main Authors: Ogweno Midiwo, J., Owuor, F.A.O., Juma, B.F., Waterman, Peter G.
Format: Article
Language:English
Subjects:
Biological and medical sciences
chemical constituents of plants
Chemical constitution
chemical structure
derivatives
diterpenoids
Fundamental and applied biological sciences. Psychology
kaurene
leaves
Plant physiology and development
Psiadia
resins
spectral analysis
trachylobane
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Summary:Two known diterpenes, ( ent)-2-oxokaur-16-en-18,19-diol (psiadin) and ( ent)-kaur-16-en-2α,18,19-triol, and three novel diterpenes, ( ent)-16 β,17-dihydroxykauran-20-oic acid, 2-oxotrachyloban-18,19-diol and trachyloban-2β,6β,19-triol have been isolated from the leaf exudate of Psiadia punctulata. The structures of the diterpenes was established on the basis of spectroscopic analysis and previously published data on the known compounds.
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(96)00812-6