the concentrations of pyrimidine nucleosides and bases , namely deoxycytidine , cytosine , cytidine , uracil , and uridine ( 22.6 , 10.1 , 5.2 , 2.9 , and 2.4 nmol/ml , respectively ) were high in plasma , whereas purine nucleosides and bases were present in concentrations less than 2.5 nmol/ml .
C0034287
pyrimidine nucleosides
C0010715
cytidine