The mononucleotides.
D000227:Adenine Nucleotides; D000478:Alkylation; D055598:Chemical Phenomena; D002621:Chemistry; D000242:Cyclic AMP; D003597:Cytosine Nucleotides; D006150:Guanine Nucleotides; D006219:Halogens; D008745:Methylation; D009705:Nucleosides; D009711:Nucleotides / Q000138:chemical synthesis; D010084:Oxidation-Reduction; D014500:Uracil Nucleotides
D000227:Adenine Nucleotides; D003597:Cytosine Nucleotides; D006150:Guanine Nucleotides; D006219:Halogens; D009705:Nucleosides; D009711:Nucleotides; D014500:Uracil Nucleotides; D000242:Cyclic AMP