Notes: 3'-Azido-2',3'-dideoxyuridine (AZddU) is an antiviral nucleoside analog.{64492} It is phosphorylated by thymidine kinase.{64493} AZddU inhibits cytopathogenicity induced by HIV or Moloney sarcoma virus (MSV) in MT-4 cells (EC50s = 0.36 and 15 µM, respectively).{64492}