112501-15-2 4''-Acetylspiramycin III 4''-O-Acetylspiramycin C Leucomycin V, 9-O-(5-(dimethylamino)tetrahydro-6-methyl-2H-pyran-2-yl)-, 4(sup B)-acetate 3-propanoate, (9-(2R,5S,6R))-