1 21W N-(4-{[(1h-imidazol-2-ylmethyl)amino]methyl}benzyl)-4-oxo-3,4-dihydrothieno[2,3-D]pyrimidine-5-carboxamide 1.000 2 9D3 N-({4-[(diethylamino)methyl]phenyl}methyl)-4-oxo-3,4-dihydrothieno[2,3-D]pyrimidine-5-carboxamide 0.742 3 21X N-[4-(aminomethyl)benzyl]-4-oxo-3,4-dihydrothieno[2,3-D]pyrimidine-5-carboxamide 0.724