1-(6-Methyl-5-oxo-5,6-dihydro-2H-pyran-2-yl)-5-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedione 5-Trifluoromethyl-1-(2,3,6-trideoxy-.alpha.-L-glycero-hex- 2-enopyranos-4-ulosyl) uracil AIDS-136496 AIDS136496 NSC638122