1,2,4-Triazole-3-carboxamide, 1-.beta.-D-ribofuranosyl- 1-.beta.-D-Ribofuranosyl-1H-1,2,4-triazole-3-carboxamide 1H-1,2,4-Triazole-3-carboxamide, 1-.beta.-D-ribofuranosyl- 36791-04-5 ICN 1229 NSC 163039 NSC163039 RTC RTCA Ribavirin Viramid Virazole