1 QEI 2-amino-5-({[(1s,4s,5r)-4,5-dihydroxycyclopent-2-en-1-yl]amino}methyl)-3,7-dihydro-4h-pyrrolo[2,3-D]pyrimidin-4-one 1.000 2 QUG 2-amino-5-({[(1s,4s,5s)-4,5-dihydroxycyclopent-2-en-1-yl]amino}methyl)-1,7-dihydro-4h-pyrrolo[2,3-D]pyrimidin-4-one 1.000