New antibiotics phthoxazolins B, C and D produced by Streptomyces sp. KO-7888
- PMID: 7649873
- DOI: 10.7164/antibiotics.48.714
New antibiotics phthoxazolins B, C and D produced by Streptomyces sp. KO-7888
Abstract
New antibiotics, phthoxazolins B, C and D were isolated from the fermentation broth of Streptomyces sp. KO-7888. They are geometrical isomers of 10-hydroxyphthoxazolin A. They showed selective antifungal activity against Phytophthora parasitica in vitro and modest herbicidal activity in a laboratory test, but the potencies were different among isomers.
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