A new antitumor antibiotic, FR-900482. II. Production, isolation, characterization and biological activity

FR-900482 is a new antitumor antibiotic produced by a new actinomyces named Streptomyces sandaensis No. 6897. It exhibits potent cytotoxic activity against various tumor cells in vitro. Furthermore, it has weak antimicrobial activity against some Gram-positive or Gram-negative bacteria.