10-Propionyljosamycin 189631-89-8 40922-77-8 56111-35-4 57078-36-1 83310-75-2 9-Propionyljosamycin EINECS 255-140-7 Josamycin propionate Leucomycin V, 3-acetate 4B-(3-methylbutanoate) 9-propanoate