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Natural Product Research
Formerly Natural Product Letters
Volume 23, 2009 - Issue 17
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Original Articles

Two new triterpenoid isomers from Nerium oleander leaves

Bina S. Siddiqui H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, PakistanCorrespondence[email protected]
,
Nasima Khatoon H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
,
Sabira Begum H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
&
Saima A. Durrani H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
Pages 1603-1608 | Received 22 Feb 2008, Accepted 22 Oct 2008, Published online: 22 Sep 2010
 
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Abstract

Two new triterpenoid isomers α-neriursate (1) and β-neriursate (2) have been isolated from the fresh, uncrushed leaves of Nerium oleander and their structures elucidated as 3α-acetophenoxy-urs-12-en-28-oic acid and 3β-acetophenoxy-urs-12-en-28-oic acid, respectively. The structure elucidation is based on spectroscopic methods, including 1D (1H NMR, 13C NMR) and 2D (1H-1H COSY, NOESY, HMQC, HMBC and J-resolved) NMR data and chemical transformation.

Acknowledgements

We are thankful to the Higher Education Commission of Pakistan for financial support of these research studies.

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