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Structure determination of ursene‐type triterpenes by NMR techniques by Zaheer Ahmed; Dildar Ali; Abdul Malik is a Chemistry article available to read on EtoBox.
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## Abstract Two new ursene‐type triterpenes, nudicauline A and nudicauline B, have been isolated from __Launaea nudicaulis__. Their structures have been assigned as 3β‐hydroxy‐urs‐11‐ene (1) and 3β‐acetyl‐urs‐11‐ene (2), respectively, by extensive NMR studies. In addition, olean‐11,13(18)‐diene (3), 3β‐hydroxy‐13(28)‐epoxy‐urs‐11‐ene (4) and 3‐keto‐13(28)‐epoxy‐urs‐11‐ene (5) are also reported for the first time from this species. Copyright © 2006 John Wiley & Sons, Ltd.
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- Author
- Zaheer Ahmed; Dildar Ali; Abdul Malik
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; John Wiley and Sons Ltd; Wiley (ISSN 0749-1581)
- Published
- 2006
- Language
- EN
- Field
- Chemistry (Physical Sciences)