title: N-methylation of purines and pyrimidines.
mesh_terms: D000225:Adenine; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D004121:Dimethyl Sulfoxide; D013058:Mass Spectrometry; D008722:Methods; D008745:Methylation; D011687:Purines; D011743:Pyrimidines; D013941:Thymine; D014527:Uric Acid; D014970:Xanthines
chemical_list: D011687:Purines; D011743:Pyrimidines; D014970:Xanthines; D014527:Uric Acid; D000225:Adenine; D013941:Thymine; D004121:Dimethyl Sulfoxide