2-[[3-Azido-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethoxy]-(2-cyano-ethoxy)-phosphorylamino]-3-phenyl-propionic acid methyl ester AIDS-161265 AIDS161265 NSC682692