5’-O-三苯甲基尿苷

2',3',5'-三乙酰尿苷

3',5'-O-(1,1,3,3-四异丙基-1,3-二硅氧烷)尿苷

2'-O-allyluridine

2′,3′-O-bis-(benzyloxycarbonyl)uridine