title: Chemical ionization mass spectrometry in structural analysis.
mesh_terms: D000473:Alkanes; D000900:Anti-Bacterial Agents; D004917:Erythromycin; D005740:Gases; D007933:Leucomycins; D013058:Mass Spectrometry; D009827:Oleandomycin; D000644:Quaternary Ammonium Compounds; D013057:Spectrum Analysis
chemical_list: D000473:Alkanes; D000900:Anti-Bacterial Agents; D005740:Gases; D007933:Leucomycins; D000644:Quaternary Ammonium Compounds; D004917:Erythromycin; D009827:Oleandomycin