三苯基氯甲烷

胸苷

(2R,3R,9aR)-3-hydroxy-7-methyl-2-(trityloxymethyl)-2,3,3a,9a-tetrahydrofuro[1,2][1,3]oxazolo[3,4-a]pyrimidin-6-one

5'-O-三苯甲基-3'-O-甲磺酰基胸苷

3'-O-(2-hydroxy)ethoxycarbonyl-5'-O-tritylthymidine