title: ESR of sulfur-substituted purines. 6-methylmercaptopurine at 300 K.
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D015122:Mercaptopurine / Q000031:analogs & derivatives*
chemical_list: D005609:Free Radicals; D015122:Mercaptopurine