PROCESS FOR PREPARING PSEUDO-AGLYCONE OF ACTAPLANIN

摘要

Antibiotic A-4696 pseudo-aglycone I and its pharmacologically permissible salts are new. Thus, 2.0g antibiotic A-4696 were dissolved in 50 ml of 5% methanolic sulfuric acid and refluxed for 70 mins. After wards, the mixt. was crystallized with water, filtered to separate the solid, and then recrystallized to give antibiotic A-4696 pseudo-aglycone sulfate salts, which were determined by mass spectroscopy, NMR, etc. The title compds. have an antibiotic activity.