most toxic to the parent lines were 2-fluoroadenosine , 2-fluoroadenine , 2-fluoro-5'-deoxyadenosine , adenosine , 6-thioguanosine , 6-thioguanine , 6-mercaptopurine , 6-mercaptopurine ribonucleoside , 2-azaadenine , 2'-deoxyinosine , 6-n-aminoadenine , and inosine .
C0039904
6-mercaptopurine ribonucleoside
C0021528
inosine