2,4(1H,3H)-Pyrimidinedione, 1-[5-O-[[[[2-chloro-3-(hexadecyloxy)propoxy]hydroxyphosphinyl]oxy]hydroxyphosphinyl]-2-deoxy-b-L-erythro-pentofuranosyl]-5-methyl- AIDS-158466 AIDS158466 NSC669256 (SODIUM SALT)