✦ LIBER ✦
Structural analysis of 3-α-acetyl-20(29)-lupene-24-oic acid, a novel pentacyclic triterpene isolated from the gum resin of Boswellia serrata, by NMR spectroscopy
✍ Scribed by Klaus Belsner; Berthold Büchele; Udo Werz; Thomas Simmet
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 111 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.1212
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✦ Synopsis
Abstract
3α‐Acetyl‐20(29)‐lupene‐24‐oic acid (1) was isolated from the gum resin of Boswellia serrata. Its presence evidently suggests, that the oxidosqualene triterpene pathway of Boswellia serrata closely resembles the biosynthetic route already found in other plants. Complete ^1^H and ^13^C spectral assignments were derived from 1D and 2D NMR spectra. This is the first compound with the lupene backbone combining a 3α‐hydroxy or 3α‐acetyl group with the 24‐carboxyl group, a configuration which is typical of the classical boswellic acids. Copyright © 2003 John Wiley & Sons, Ltd.