1 37P 5'-O-{[5-(7-hydroxy-3-oxo-3h-phenoxazin-2-yl)pentanoyl]sulfamoyl}adenosine 1.000 2 44N 2'-C-methyl-5'-O-({5-[(3as,4s,6ar)-2-oxohexahydro-1h-thieno[3,4-D]imidazol-4-yl]pentanoyl}sulfamoyl)adenosine 0.714