It is produced by the strain of Str. capreolus MG 265-CF3. It's a nucleoside antibiotic. It has weak anti-gram-negative effect on peptone AGAR medium but no antibacterial effect on nutrient AGAR medium. It has antagonistic effect on guanine, guanosine and 5'-guanidine. In vitro, it inhibits HeLa cells with IC50 of 32 mg/kg. In mice, it has inhibitory effect on the leukemia L-1210.