## Abstract The ^29^Si and ^13^C NMR chemical shifts are reported for trimethylsilyl derivatives of 25 amino acids, the majority of which occur naturally as protein constituents of foodstuffs. The ^29^Si chemical shifts in trimethylsilyl esters of amino acids roughly correlate linearly with the p__
13C NMR spectra of trimethylsilylated secondary steroid alcohols
✍ Scribed by Jan Schraml; Jan Čermák; Alexander Kasal
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 294 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The ^13^C NMR chemical shifts of 39 trimethylsilylated secondary steroid alcohols are presented. The compounds include both 5α‐ and 5β‐steroid skeletons and the trimethylsiloxy groups are attached at various positions both in α‐ and β‐configurations.
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## Abstract ^13^C‐NMR. spectra of pterin, xanthopterin, isoxanthopterin, leucopterin, lumazine and of the model compounds isocytosine and desamino‐isocytosine have been measured as anions and cations in 1 M NaOD, CF~3~COOH, H~2~SO~4~ and FSO~3~H solutions. The spectra were analysed by means of hete