1 3QA (3r,4s)-1-[(4-amino-5h-pyrrolo[3,2-D]pyrimidin-7-yl)methyl]-4-(2-{[2-(2-hydroxyethoxy)ethyl]sulfanyl}ethyl)pyrrolidin-3-ol 1.000 2 C1Y (3r,4s)-1-[(4-amino-5h-pyrrolo[3,2-D]pyrimidin-7-yl)methyl]-4-propylpyrrolidin-3-ol 0.704