It is produced by the strain of Str. hygroscopicus B-5050. It's a macrolide antibiotic. It has the activity against gram-positive bacteria and mycoplasma. It has anti-mycobacterial effect but the effect is not strong. It also has weak antibacterial effect on individual fungi.Serum dose not affect its antibacterial activity. It has the effect of protecting gram-positive bacterial infection mice, and the therapeutic dose is similar to styloleomycin.