New quinone antibiotics of the granaticin type, isolated from Streptomyces lateritius. II. Structure determination.

ABSTRACT

A number of new granaticin type quinone antibiotics have been isolated from Streptomyces lateritus ATCC 19913. Spectroscopic evidence is presented which has led to the structure elucidation of three new antibiotics and the chemical relationship between members of the granaticin series has been studied.