2,4(1H,3H)-Pyrimidinedione, 1-[3-azido-2,3-dideoxy-5-O-[[[(2R,5S)-5-(3,4-dihydro-4-imino-2-oxo-1(2H)-pyrimidinyl)tetrahydro-2-furanyl]methoxy]hydroxyphosphinyl]pentofuranosyl]-5-methyl- AIDS-161464 AIDS161464 NSC693166