Cytidine ( cytosine nucleoside ) a nucleoside formed when cytosine is linked to dribose via a.
胞嘧啶核苷：当胞嘧啶通过β－糖苷键与。
Occurs in rna , thymine in dna , and adenine , guanine , and cytosine in both , as part of the nucleosides uridine , deoxythymidine , adenosine or deoxyadenosine , guanosine or deoxyguanosine , and cytidine or deoxycytidine .
