Incorporation of 13C-labelled acetates and methionine, 14C and ZH-labelled ethyl 3,5-dimethylorsellinate into terretonin (5) by cultures of Aspergillus terreus indicated that its biosynthesis proceeds via a mixed polyketide-terpenoid (meroterpenoid) pathway. Incorporation of 1803 gas and ethyl 3,5-d
The biosynthesis of 2,5,6-trihydroxy-9-phenylphenalenone by Lachnanthes tinctoria. Incorporation of 1-13C-phenylalanine
โ Scribed by Alan D Harmon; J.M Edwards; R.J Highet
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 194 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0040-4039
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## Abstract Proton and carbon NMR chemical shift assignments for (+)โ(__S__)โ4,5,6,7โtetrahydroimidazoโ9โchloroโ5โmethylโ6โ(3โmethylbutโ2โenyl)imidazo[4,5,1โ__jk__][1,4] benzodiazepinโ2(1__H__)โthione (TIBO) were made based on 1D and 2D NMR measurements at 9.4 T.
The iniluence of substituents on the 'H, "C and 15N NMR chemical shifts of 2-substituted 5(6)nitrobenzimidazoles and their analogues labelled with 15N in the nitro group was investigated. It was found that the substituent effects are transmitted to the carbon and hydrogen nuclei in positions 4-7 mai
The and of deuterium in 13C/2H double-labeled 2@(R/S),5@(R/S)-
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