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

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.

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Acknowledgements

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

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Two new triterpenoid isomers from Nerium oleander leaves

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Two new triterpenoid isomers from Nerium oleander leaves

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