Novel Antibiotics Pyrisulfoxin A and B Produced by Streptomyces californicus.

Abstract

In the course of our screening for new antibiotics active against P388 murine leukemia cells, novel antibiotics named pyrisulfoxin A (1) and pyrisulfoxin B (2) were isolated from the culture broth of Streptomyces californicus BS-75. In this paper, we report the isolation and structures of 1 and 2.