(-)-cis-1,2-Epoxypropylphosphonate de josamycine [French] 96740-84-0 Josamycin fosfomycin Leucomycin V, 3-acetate 4(sup B)-(3-methylbutanoate), (2R-cis)-(3-methyloxiranyl)phosphonate (1:1) Leucomycin V, 3-acetate, 4B-(3-methylbutanoate), (2R-cis)-(3-methyloxiranyl)phosphonate (1:1)