130482-07-4 4''-Acetylspiramycin I Leucomycin V, 9-O-(5-(dimethylamino)tetrahydro-6-methyl-2H-pyran-2-yl)-, 4(sup B)-acetate, (9-(2R,5S,6R))- Leucomycin V, 9-O-(5-(dimethylamino)tetrahydro-6-methyl-2H-pyran-2-yl)-, 4B-acetate, (9(2R,5S,6R))-