Deoxyribonucleosides, chemical structure

The ring structure of the sugar of the purine ribonucleosides was shown by chemical methods to be furanoid by Levene and Tipson. These studies have been adequately reviewed by Tipson. The fact that 2-deoxy-inosine and 2-deoxyguanosine do not affect the conductivity of boric acid solutions indicates the absence of a m-1,2-glycol system and, coupled with the anhydronucleoside formation mentioned below, provides evidence that the purine 2-deoxyribonucleosides are also in the furanoid form. 

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