1 C77 5'-deoxy-2',3'-O-(1-methylethylidene)-5'-(4-{5-[(3as,4s,6ar)-2-oxohexahydro-1h-thieno[3,4-D]imidazol-4-yl]pentyl}-1h-1,2,3-triazol-1-yl)adenosine 1.000 2 A1BGF 5'-deoxy-5'-(4-{5-[(3as,4s,6ar)-2-oxohexahydro-1h-thieno[3,4-D]imidazol-4-yl]pentyl}-1h-1,2,3-triazol-1-yl)adenosine 0.833