(1R,4S,5S)-1-(benzyloxymethyl)-2-en-4,5-(O-isopropylidenedioxy)-cyclopentan-1-ol

(1R,4R,5S)-9-[3-(tert-butyldiphenylsilyloxymethyl)-4,5-isopropylidenedioxy-2-cyclopenten-1-yl]-N6,N6-bis(tert-butoxycarbonyl)adenine