title: The study and characterization of nucleosides by mass spectrometry. 3. Comparison between the mass spectra of trimethylsilyl derivatives of purine 2'-and 3'-linked anhydro, thioanhydro, and aminoanhydro nucleosides.
mesh_terms: D000588:Amines; D003500:Cyclization; D006863:Hydrogen-Ion Concentration; D006900:Hydroxylation; D007536:Isomerism; D013058:Mass Spectrometry; D008745:Methylation; D009705:Nucleosides / Q000032:analysis*; D011687:Purines / Q000032:analysis; D012825:Silicon; D013057:Spectrum Analysis; D013329:Structure-Activity Relationship
chemical_list: D000588:Amines; D009705:Nucleosides; D011687:Purines; D012825:Silicon