Studies on the Antibiotic Substances from Actinomyces: 7th Report On the Isolation of Special Anti-phlei Factor from an Actinomyces in a Crystalline Form

A basic antibiotic, active selectively against acid fast organisms, was isolated in a crystalline helianthate (d. p. 243-247 C), from the filtrate of Str. aureus, No. 364. The converted hydrochloride was also highly active against Mycob. tuberculosis (human type) in Dubos's medium, and showed no toxicity to mice.