Metabolic products of microorganisms. 245. Colabomycins, new antibiotics of the manumycin group from Streptomyces griseoflavus. II. Structure of colabomycin A.
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چکیده
منابع مشابه
Metabolic products of microorganisms. 246. 2880-II, a metabolite related to ferulic acid from Streptomyces griseoflavus.
By chemical screening methods we detected in the mycelium of Streptomyces griseoflavus (strain Tii 2880) the colabomycin-complex2) and a second compound, called 2880-ll (Rf values see Table 1). 2880-ll absorbed UV light on Silica gel F254, and turned black with molybdatophosphoric acid and dark brown with vanillinsulfuric acid. It could be separated from the crude extracts by silica gel chromat...
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The structures of the angucycline antibiotics urdamycin B (5), E (2) and F (9) were established by comparing of their spectra with those of urdamycin A (1). The structures of urdamycins C and D, the largest compounds of this series, are still incomplete (10 and 11). The aglycones urdamycinone C, D and E can be liberated by methanolysis of the corresponding urdamycins. The liberation of urdamyci...
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Nisamycin, a novel manumycin group antibiotic, was isolated from the culture broth of Streptomyces sp. K106. Structural elucidation of nisamycin was achieved by detailed NMR spectral analyses and comparison of the NMR data of nisamycin with those of other manumycin group antibiotics. The structure was confirmed by chromic acid oxidation. The absolute stereochemistry of nisamycin was determined ...
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ژورنال
عنوان ژورنال: The Journal of Antibiotics
سال: 1988
ISSN: 0021-8820,1881-1469
DOI: 10.7164/antibiotics.41.1186