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Journal of Asian Natural Products Research Volume 9, 2007 - Issue 1
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Original Articles

Two new trans-clerodane diterpenoids from Otostegia limbata

V. U. Ahmad International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, 75270, PakistanCorrespondence[email protected]
,
A. Khan International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
,
U. Farooq International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
,
F. Kousar International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
,
S. S. Khan International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
&
J. Hussain International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
Pages 91-95 | Received 26 Apr 2005, Accepted 14 Sep 2005, Published online: 28 Feb 2007
 
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Abstract

Two new tricyclic clerodane-type diterpenoids, limbatolide D (1) and limbatolide E (2), have been isolated from the roots of Otostegia limbata. Their structures and the relative configuration were established on the basis of spectral methods, especially two-dimensional (2D) NMR techniques.

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