2'-O-t-butylthiocarbonyluridine

3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-2'-O-(methoxymethyl)uridine

2'-O-(aminooxymethyl)uridine

1,2,3,5-四-O-乙酰基-β-D-呋喃核糖

uridylyl-(3'->5')-guanosine