(1'S,3'S,4'S,5'S)-3'-Azido-4'-(hydroxymethyl)-1'-(5-methyl-2,4-(1H,3H)-dioxopyrimidin-1-yl)bicyclo[3.1.0]hexane 5'-triphosphate (S)-methano-carba-AZT 5'-triphosphate AIDS-081406 AIDS081406