New antitumor antibiotics, OS-4742 A1, A2, B1 and B2 produced by a strain of Streptomyces.

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  • New antitumor antibiotics,OS-4742 A1,A2,B1 and B2 produced by strain of Streptomyces
  • New antitumor antibiotics OS 4742 A1 A2

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Abstract

New antibiotics, OS-4742 A1, A2, B1 and B2, were isolated from the culture broth of the strain OS-4742, which was designated as Streptomyces matensis subsp. <sub>vineus</i>. These compounds have anthracycline chromophores and sugar moieties, but do not contain nitrogen. They possess antimicrobial activities against Gram-positive bacteria and antitumor activities against S-180 solid tumor on mice.

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