title: Carbon-13 magnetic resonance spectra of C-nucleosides. 3. la-c Tautomerism in formycin and formycin B and certain pyrazolo[4,3-d]pyrimidines.
mesh_terms: D000903:Antibiotics, Antineoplastic; D005573:Formycins; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D009705:Nucleosides; D011720:Pyrazoles; D011741:Pyrimidine Nucleosides; D011743:Pyrimidines
chemical_list: D000903:Antibiotics, Antineoplastic; D005573:Formycins; D009705:Nucleosides; D011720:Pyrazoles; D011741:Pyrimidine Nucleosides; D011743:Pyrimidines