134934-56-8 2'-Morph-5'(4MeOTrityl)ddU 2'-Morpholino-5'-(4-methoxytrityl)-2',3'-dideoxyuridine AIDS-002329 AIDS002329 Uridine, 2',3'-dideoxy-5'-O-[(4-methoxyphenyl)diphenylmethyl]-2'-(4-morpholinyl)-