Nucleoside Nomenclature
	• Add –idine to root name of the pyrimidine • cytosine  ®  cytidine • uracil ®  uridine • thymine ®  thymidine (ribothymidine) • Add –osine to the root name of the purine • adenine  ®  adenosine • guanine  ®  guanosine • xanthine ®  xanthosine • Except  hypoxanthine ®  inosine (See Fig. 11.11)