Oblon, Fisher, Spivak, McClelland & Maier
Process for producing an antibiotic
 An antibiotic KA-6643-A or a salt thereof having the formula: ##STR1## is produced by a process comprising the step of hydrolyzing an antibiotic KA-6643-B of the formula: ##STR2## 
Kowa Co., Ltd.
C
C07D
inventional
Sohei Toshimi Shigeru Toshihito Masahito
Tanabe Mizoguchi Kimura Mori Nakayama