PROCESS FOR THE PRODUCTION OF NEW PEPSTATINS HAVING ANTI-PEPSIN ACTIVITY

摘要

1394231 Pepsin inhibitors ZAIDAN HOJIN BISEIBUTSU KAGAKU KENKYO KAI 8 March 1972 [26 March 1971] 10887/72 Heading C2C [Also in Division C3] Novel compounds of the Formula I wherein R is n-hexanoyl or isohexanoyl and C 1-4 alkyl esters and salts thereof are prepared by cultivating under aerobic conditions Streptomyces testaceus (ATCC No. 21467) or Steptomyces argenteolus var. toyonakensia (ATCC No. 21468) and, if desired, converting the resulting acids into esters or salts.