free radicals produced by x-irradiation of n2o-saturated aqueous solutions of purine nucleosides ( 2'-deoxyadenosine , adenosine , 2'-deoxyguanosine , 3'-deoxyadenosine , guanosine and inosine ) and the corresponding homopolymers ( poly a and poly i ) have been investigated by the technique of spin-trapping and e.s.r . spectroscopy .
C0034136
purine nucleosides
C0001443
adenosine