Salfredins, New Aldose Reductase Inhibitors Produced by Crucibulum sp. RF-3817. I. Fermentation, Isolation and Structures of Salfredins.

The Journal of Antibiotics
1995.0

Abstract

New inhibitors of aldose reductase, designated salfredins A3, A4, A7, C1, C2, C3 and B11, were isolated from the fermentation broth of Crucibulum sp. RF-3817 by successive purification procedures of solvent extraction, silica gel column chromatographies and reverse-phase HPLC. Their structures were established by spectroscopic methods, including UV, SI-MS and NMR. The structures of salfredins A4 and B11 were confirmed by X-ray crystallographic analysis.

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