1 45T {[(2s)-3-(2-amino-6-oxo-1,6-dihydro-9h-purin-9-yl)propane-1,2-diyl]bis(oxyethane-2,1-diyl)}bis(phosphonic acid) 1.000 2 3QE {[(2r)-3-(2-amino-6-oxo-1,6-dihydro-9h-purin-9-yl)propane-1,2-diyl]bis(oxyethane-2,1-diyl)}bis(phosphonic acid) 1.000 3 4X7 (2-{[(2s)-1-(2-amino-6-oxo-1,6-dihydro-9h-purin-9-yl)-3-hydroxypropan-2-yl]oxy}ethyl)phosphonic acid 0.724 4 25H {2-[2-(2-amino-6-oxo-1,6-dihydro-9h-purin-9-yl)ethoxy]ethyl}phosphonic acid 0.714