7-Dimethylamino-<1,2,5>thiadiazolo<3,4-d>pyrimidin
7-Dimethylamino-2-phenyl-1,3-diaza-1,3-dihydro-2-phospholo<4,5-d>pyrimidin-2-oxid
7-Dimethylamino-2-methyl-1,3-diaza-1,3-dihydro-2-phospholo<4,5-d>pyrimidin-2-oxid
7-Dimethylamino-v-triazolo
6-(dimethylamino)purine