2,4-Pyrimidinediamine, 6-(1,4'-bipiperidin)-1'-yl-, 3-oxide, dihydrochloride, hemihydrate 4-(1,4'-Bipyridin-1'-yl)-2,6-diaminopyrimidine 1-oxide dihydrochloride hemihydrate 83540-15-2 Pyrimidine, 4-(1,4'-bipyridin-1'-yl)-2,6-diamino-, 1-oxide, dihydrochloride, hemihydrate