2,4(1H,3H)-Pyrimidinedione, 5,6-diamino-, sulfate (1:1) 3240-72-0 4,5-Diaminouracil sulfate 42965-55-9 5,6-Diamino-2,4-dihydroxypyrimidine sulfate 5,6-Diaminopyrimidine-2,4-diol sulphate 5,6-Diaminouracil sulfate EINECS 256-022-8 NSC 264289