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A soil isolate of Streptomyces, which has been deposited in the culture collection of the Waksman Institute of Microbiology, Rutgers University as IMRU 3962, produces a new heptaene macrolide antifungal antibiotic, hydroheptin. The producing microorganism, which co-produces the antibiotic, chartreusin, has been identified as a strain of Streptomyces chartreusis. Fermentation and bioassay procedures were developed for the production and analysis of hydroheptin and chartreusin. Isolation and purification procedures based on solvent extraction and precipitation of an organic acid yielded a relatively pure product of hydroheptin.

Hydroheptin: A water-soluble polyene macrolide. I. Taxonomy, fermentation and isolation.