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Two new antibiotics, pentenomycins I and II have been isolated from the culture broth of Streptomyces eurythermus MCRL 0738 as a white hygroscopic amorphous powder. Pentenomycins [I: C6H8O4•1/2H2O (I), II: C8H10O5•1/2H2O (II)] are moderately active against Gram-positive and Gram-negative bacteria.
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Umino et al. (1973) studied this question.
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