2(1H)-Pyrimidinone, 1-[2-deoxy-3-O-[[[5-(3,4-dihydro-4-imino-2-oxo-1(2H)-pyrimidinyl)tetrahydro-2-furanyl]methoxy]hydroxyphosphinyl]pentofuranosyl]-4-(hexadecylamino)- AIDS-161247 AIDS161247 NSC680416