Leptomycins A and B, new antifungal antibiotics. II. Structure elucidation.
نویسندگان
چکیده
منابع مشابه
Leptomycins A and B, new antifungal antibiotics. II. Structure elucidation.
The structures of new antifungal antibiotics, leptomycins A and B produced by Streptomyces sp. ATS1287 were determined as described below (Fig. 1) on the basis of their spectral and chemical character. Leptomycins have unique structures which belong to the unsaturated, branched-chain fatty acids with delta-lactone rings at the end.
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The structure of a new antifungal antibiotic, mycoversilin, produced by Aspergillus versicolor (N5)17 was determined as I by various spectroscopic and chemical methods. Mycoversilin is a unique polynuclear aromatic compound having two methyl and six hydroxyl groups and two ether linkages. The acetyl derivative prepared was found to have no antifungal property.
متن کاملLeptomycins A and B, new antifungal antibiotics. I. Taxonomy of the producing strain and their fermentation, purification and characterization.
A strain of Streptomyces was found to produce new antifungal antibiotics. The active compounds were purified and separated into two substances named leptomycin A and B by high performance liquid chromatography. The molecular formulae of leptomycins A and B are C32H46O6 and C33H48O6 respectively, and physicochemical and biological properties of them are very similar to each other. Leptomycins A ...
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Helvecardins A and B, which are produced by Pseudonocardia compacta subsp. helvetica, are new members of glycopeptide antibiotics. They contain the same pseudoaglycone as beta-avoparcin and the same compositions of neutral sugar, amino sugar, and amino acid except that 2'-O-methylrhamnose was detected in helvecardins instead of rhamnose in beta-avoparcin, and mannose was not detected in helveca...
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ژورنال
عنوان ژورنال: The Journal of Antibiotics
سال: 1983
ISSN: 0021-8820,1881-1469
DOI: 10.7164/antibiotics.36.646