1 HXN 3-[[6-bromanyl-2-[3-(dimethylamino)propyl-methyl-amino]quinazolin-4-yl]-methyl-amino]propanenitrile 1.000 2 HWT 3-[[2-[3-(dimethylamino)propyl-methyl-amino]thieno[3,2-D]pyrimidin-4-yl]-methyl-amino]propanenitrile 0.846 3 HWW 3-[[6-~{tert}-butyl-2-[3-(dimethylamino)propyl-methyl-amino]thieno[3,2-D]pyrimidin-4-yl]-methyl-amino]propanenitrile 0.733