A full assignment of the 13C signals of four pentacyclic triterpenes confirms the results obtained by 'H NMR analysis of steroidal methyls, resolving the stereochemistry of the oxidation product of 3-~-acetoxyolean-12-en-30-oic acid methyl ester.
Comparison of the structures of humic acids from marine sediments and degraded field diatoms by 13C- and 1H-NMR spectroscopy
✍ Scribed by E.-L. Poutanen; R.J. Morris
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 657 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0304-4203
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