3',5'-bis-O-acetyl-4-thio-2'-deoxyuridine

2'-脱氧尿苷

3',5'-二-O-(叔-丁基二甲基硅烷基)-2’-脱氧尿苷

3',5'-bis-O-(tert-butyldimethylsilyl)-S-(2-cyanoethyl)-4-thio-2'-deoxyuridine

2'-deoxy-3',5'-bis-O-(tert-butyldimethylsilyl)-4-O-[(2,4,6-triisopropylbenzene)sulfonyl]uridine