In the course of a study of antiphage substances a yellow, crystalline antibiotic substance, which has been named Chrysomycin, was isolated from an unidentified Streptomyces. A number of yellow antibiotic substances derived from Streptomyces have recently been described, among others aureolic acid (Philip and Schenck, 1953), chartreusin (Leach et al., 1953), limocrocin (Brockmann and Grothe, 19...
