title: X-ray crystallography of protylonolide and absolute configuration of tylosin.
mesh_terms: D003461:Crystallography; D007783:Lactones; D007933:Leucomycins; D008968:Molecular Conformation; D015645:Tylosin / Q000031:analogs & derivatives*; D014961:X-Ray Diffraction
chemical_list: D007783:Lactones; D007933:Leucomycins; C027411:protylonolide; D015645:Tylosin