5-(3-benzoylpropionyl)-3-deoxy-3-diisopropoxyphosphinylmethyl-1,2-di-O-acetyl-D-ribofuranose

5'-(3-benzoylpropionyl)-3'-deoxy-3'-dihydroxyphosphinylmethyl-2'-O-acetyl uridine pyridinium salt

5-O-(3-benzoylpropionyl)-3-deoxy-3-bromomethyl-1,2-di-O-acetyl-D-ribofuranose

5'-(benzoylpropionyl)-3'-deoxy-3'-diisopropoxyphosphinylmethyl-2'-O-acetyl uridine

3'-deoxy-3'-dihydroxyphosphinylmethyl-2'-O-acetyl uridylyl-(3'<*>5')-2',3'-O-isopropylidene uridine pyridinium salt