Heliomycin was isolated as a stable polyketide antibiotic substance produced by Streptomyces resistomycificus. Heliomycin has been shown to demonstrate antibacterial activity against gram-positive bacteria and mycobacteria. Heliomycin preferentially inhibits RNA synthesis in comparison to DNA and protein synthesis in intact bacterial cells. Heliomycin is indicated for the treatment of various dermatological pathologies, including pyoderma, pemphigus or pemphigus of newborns, trophic ulcers infected secondarily, microbial eczema, cracked nipples in women breastfeeding a baby, pseudofurunculosis and others. Since heliomycin is low in toxicity, the only contraindication is increased individual intolerance to the components of the ointment. It is cytotoxic to gastric adenocarcinoma HMO2 cells and hepatic carcinoma HePG2 cells.