1-((2R,3R,4S,5R)-3,4-Dihydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-5-ethynyl-1-H-imidazole-4-carboxylic acid amide 118908-07-9 5-Ethynyl-1-.beta.-D-ribofuranosylimidazole-4-carboxamide AIDS-002980 AIDS002980 EICAR