Carbon-13 NMR study of (20,24)-epoxydammarane triterpenes
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چکیده
منابع مشابه
The carbon-13 NMR spectrum of gougerotin.
Gougerotin was isolated from Streptomyces gougerotii in 1962", its structure was established in 19692' and total syntheses were announced in 1972" and in 19754'. In the course of a soil screen we isolated gougerotin from an organism identified as Streptom}ices puniceus subsp. doliceus subsp. nov. (NRRL 11160). It was co-produced with the clazamycins''". The ultraviolet'' and proton magnetic res...
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Further examination of the hexane extract of the root bark of Simarouba amara (Simaroubaceae) has led to the isolation of two side chain oxygenated A’tirucallol-type triterpenes in addition to the already reported compounds 4 and S. One has been found to be identical with the known melianone 8 and the second is a new compound and has been shown to be 21,20-anhydromelianone 11. The 13C-NMR spect...
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During chemical studies of bleomycin, many fragments and derivatives have been isolated and characterized. The 13C-NMR spectra of these compounds were taken and analyzed for structural information, and the complete assignment of the spectra was achieved. The 13C-chemical shift map thus obtained contains information about the structure and conformation and will be useful for studies on the chemi...
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Solid-state (13)C nuclear magnetic resonance (NMR) and elemental analysis techniques were used to monitor the degradation of wheat bran by the white-rot fungus Pleurotus ostreatus during a 62-day cultivation period. The weight loss and in vitro organic matter digestibility of the substrate were also evaluated after fungal treatment. The (13)C NMR spectra of degraded wheat bran samples showed a ...
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ژورنال
عنوان ژورنال: Organic Magnetic Resonance
سال: 1984
ISSN: 0030-4921,1097-458X
DOI: 10.1002/mrc.1270220108