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

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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Two new trans-clerodane diterpenoids from Otostegia limbata

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Two new trans-clerodane diterpenoids from Otostegia limbata

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