<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Any of the glycosylamines consisting of either a purine or pyrimidine nucleobase, to a ribose or deoxyribose ring. Examples of these include cytidine, uridine, adenosine, guanosine, thymidine, inosine and others.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>