2,4-Pyrimidinediamine, 6,6'-(4,4'-bipiperidine)-1,1'-diylbis-, 3,3'-dioxide 4,4'-(4,4'-Bipyridine-1,1'-diyl)bis(2,6-diaminopyrimidine 1-oxide) 83540-14-1 Pyrimidine, 4,4'-(4,4'-bipyridine-1,1'-diyl)bis(2,6-diamino-, 1,1'-dioxide