134934-54-6 2'-Pyrrolidino-5'-(4-MeOPh3)ddU 2'-Pyrrolidino-5'-(4-methoxytrityl)-2',3'-dideoxyuridine AIDS-001726 AIDS001726 Uridine, 2',3'-dideoxy-5'-O-[(4-methoxyphenyl)diphenylmethyl]-2'-(1-pyrrolidinyl)-