3'-Azido-2',3'-dideoxy-5-[N-15-[4-(3,5-dimethylbenzyl)-5-ethyl-6-methyl-2-oxo-(1H)-pyridin-3-yl]-4,9,12,15-tetraaza-3,8,11,14-tetraoxopentadecanyl]uridine AIDS-123035 AIDS123035