macrolide antibiotic josamycin A macrolide antibiotic from Streptomyces narbonensis subsp. josamyceticus. The drug has antimicrobial activity against a wide spectrum of pathogens. ChEBI:31739 CAS:16846-24-5 ARO:3001221 antibiotic_resistance PubChem:5284579 ChEMBL:CHEMBL224436