2,4-Pyrimidinediamine, 6-chloro-N(sup 4)-(2-(dimethylamino)ethyl)-N(sup 2),N(sup 2)-dimethyl-5-(methylthio)- 2-Dimethylamino-4-(2'-dimethylamino)ethylamino-5-methylthio-6-chloropyrimidine 55416-97-2