1-.beta.-D-Ribofuranosyl-1,2,4-triazolo-3'-carboxamide & 2',3'-Dideoxycytidine-2'-ene(ddeCyd) 1H-1,2,4-Triazole-3-carboxamide, 1-.beta.-D-ribofuranosyl- & Cytidine, 2',3'-didehydro-2',3'-dideoxy- 36791-04-5 7481-88-1 AIDS-000864 AIDS000864 Ribavirin & D4C