New antifungal antibiotics, butyrolactols A and B, have been isolated from the culture broth of Streptomyces rochei S785-16. They are novel type of molecules containing a common 2,3-dihydroxybutyrolactone nucleus substituted with a different long hydroxyalkyl side chain. Butyrolactol A showed good antifungal activity against Aspergillus fumigatus and Trichophyton mentagrophytes, and moderately inhibited the growth of yeasts.
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Kotake et al. (1992) studied this question.
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