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  • Chemistry  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Mikroorganismen. 253. Mitteilung252, Mitteilung. Hormaomycin, ein neues Peptid-lacton mit morphogener Aktivität auf Streptomyceten (1989)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 72 (1989), S. 426-437 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hormaomycin, a Novel Peptide Lactone with Morphogenetic Activity on StreptomycesA culture identified as Streptomyces griseoflavus (strain W-384) has been found to produce a novel peptide-lactone antibiotic designated hormaomycin (6). The empirical molecular formula of the compound is established to be C55H69ClN10O14. The constituent amino acids of the antibiotic are suggested to be allothreonine (1; 1), isoleucine (2; 1), 3-methyl-phenylalanine (3; 2), and, for the first time identified from a natural source, 4-[(Z)-prop-1-enyl]-proline (4; 1) and 3-(2-nitrocyclopropyl)-alanine (5; 2). The amino acids were delivered by acidic hydrolysis and assigned by high-resolution- GC/MS analysis (after transformation to derivatives) in combination with extended 2D-NMR experiments of the antibiotic itself. From the latter, it became plausible that the N-terminus of the peptide chain is acylated by a Cl-containing derivative of 1H-pyrrol-2-carboxylic acid. Hormaomycin is active against some Gram-positive bacteria. In addition, the antibiotic exhibits potent aerial mycelium-inducing activity and effects the production of antibiotics.
    Notes: No abstract.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19890720303
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Mikroorganismen. 177. Mitteilung176. Mitt. s. [1].. Avilamycin C (1979)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 62 (1979), S. 1-6 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: From cultures of the Avilamycin (Avilamycin A) producing organism, Streptomyces viridochromogenes, strain ETH 23575, a second antibiotic, Avilamycin C, C61H90Cl2O32 could be isolated in crystalline form. Both Avilamycins belong to the group of the Orthosomycins. By IR., 1H- and 13C-NMR. spectroscopy and by transformation to a common derivative it could be proven that Avilamycin A is a methyl ketone, Avilamycin C the corresponding methyl carbinol.
    Notes: NO Abstract.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19790620102
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Isolierung, 13C-NMR-spektren und Biogenese von Resistomycin und Resistoflavin aus Streptomyces griseoflavus B 71 (Actinomycetales) (1983)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 835-843 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Isolation, 13C NMR Spectra, and Biosynthesis of Resistomycin and Resistoflavin from Streptomyces griseoflavus B 71 (Actinomycetales)From the mycelium of Steptomyces griseoflavus B 71 (Actinomycetales) resistomycin (1), resistoflavin (2), and 2-pyrrolecarboxylic acid (3) were isolated. 13C NMR spectra of 1 and 2 were recorded and assigned using long-range C,H coupling and H/D exchange. Feeding experiments with [1-13C]- and [1,2-13C]-acetate confirm biosynthesis from a decaketide precursor 4a folded in an S-shaped loop.
    Notes: Aus dem Mycel von Streptomyces griseoflavus B 71 (Actinomycetales) konnten Resistomycin (1), Resistoflavin (2) und 2-Pyrrolcarbonsäure (3) isoliert werden. Von 1 und 2 wurden die 13C-NMR-Spektren aufgenommen und mit Hilfe weitreichender C,H-Kopplungen und H/D-Austausch interpretiert. Nach Fütterungsexperimenten mit [1-13C]- und [1,2-13C]-Acetat geht 1 aus einem S-förmig gefalteten Decaketid 4a hervor.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198319830509
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    Paper (German National Licenses)
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