Arizonins, a new complex of antibiotics related to kalafungin. II Isolation and characterization.

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Abstract
A new complex of anti-Gram-positive antibiotics was produced by the fermentation of Actinoplanes arizonaensis. The antibiotics were recovered from the fermentation broth with Amberlite XAD-7 resin and from the mycelium by acetone lysis. UV, IR, MS and NMR spectral studies characterized these compounds as kalafungin-type antibiotics. They differ from other known members by an unusual oxidation pattern on the aromatic ring. They vary from one another by the degree and position of O-methylation on the aromatic ring and in the aliphatic portion of the molecules. The structure of one component was confirmed by X-ray diffraction analysis.

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