Flynn & Frishauf
Novel antibiotic substance SF-1540 and its derivative, and process for the production thereof
 A novel antibiotic substance SF-1540 and a process for preparing the same which comprises culturing a substance SF-1540-producing microorganism belonging to the genus Streptomyces in a medium and isolating and recovering the substance SF-1540 from a cultured broth; a novel derivative of the substance SF-1540 and a process for preparing the same which comprises treating said antibiotic substance SF-1540 with methanol to form the corresponding antibiotic substance SF-1540 derivative. 
Meiji Seika Kaisha Ltd.
A Y
A61K Y10S
inventional additional
Hiroshi Taro Takashi Shigeharu Yasumitsu Tetsuro
Watanabe Niida Shomura Inouye Kondo Watanabe