Two new rare-class tetracyclic diterpenoids from Otostegia limbata |
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| Authors: | Farooq Umar Khan Afsar Ahmad Viqar Uddin Khan Saleha Suleman Kousar Farzana Arshad Saima |
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| Institution: | International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan. |
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| Abstract: | Two new tetracyclic diterpenoids trivially named as limbatenolide D (1) and limbatenolide E (2) have been isolated from Otostegia limbata. The structure elucidation of the compounds was based primarily on two-dimensional (2D) NMR techniques and on comparison with the literature data. |
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