title: Fourier transform C-13 NMR analysis of some free and potassium-ion complexed antibiotics.
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis*; D002087:Butyrates / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D011188:Potassium / Q000032:analysis*; D014634:Valinomycin / Q000032:analysis; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D002087:Butyrates; D014634:Valinomycin; D011188:Potassium