PROCESS FOR PREPARING ANTIBIOTIC SUBSTANCES COMPRISING CO MPOUNDS 35763 36926 37277 AND 37932 OR ANTIBIOTIC MIXTURE S THEREOF

摘要

A process for preparing antibiotic substances comprising compounds 35,763, 36,926, 37,277 and 37,932 or antibiotic mixtures thereof characterized by cultivating Actinoplanes auranticolor ATCC 31011 under submerged aerobic conditions in an acqueous nutrient medium containing an assimilable source of carbon and nitrogen until-substantial antibiotic activity is obtained and, if desired, separating by methods as described herein said antibiotic or said antibiotic mixture therefrom.