title: Gas-liquid chromatography of pyrimidine and purine nucleosides as their N,O-permethyl derivatives.
mesh_terms: D002849:Chromatography, Gas; D008722:Methods; D008745:Methylation; D011684:Purine Nucleosides / Q000032:analysis*; D011741:Pyrimidine Nucleosides / Q000032:analysis*
chemical_list: D011684:Purine Nucleosides; D011741:Pyrimidine Nucleosides