Crystal and molecular structure of alnuserol, a new 11-hydroxylated C31 dammarane-type triterpene from Alnus serrulatoides
- 1 January 1978
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 4,p. 347-349
- https://doi.org/10.1039/p29780000347
Abstract
The molecular structure and absolute configuration of alnuserol, (1), a novel 11-hydroxylated C31 dammarane-type triterpene from Alnus serrulatoides Call., were determined to be (11R,20S,24R)-20,24-epoxy-11-hydroxy-24-methyldammaran-3-one (1) by a combination of spectroscopic and X-ray crystallographic methods. Crystals are orthorhombic, space group P212121, a= 6.599(2), b= 14.921(3), c= 28.443(8)Å, Z= 4. The structure was determined from diffractometer data by direct methods and refined by full-matrix least-squares techniques to R 0.054 for 2 064 reflections.Keywords
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