title: The field ionization spectra of some natural coumarins.
mesh_terms: D002248:Carbon Monoxide; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D003374:Coumarins / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods; D014197:Trees
chemical_list: D003374:Coumarins; D002248:Carbon Monoxide