2,4-Pyrimidinediamine, N(sup 4)-(2-(bis(1-methylethyl)amino)ethyl)-6-chloro-N(sup 2)-methyl-5-(methylthio)-N(sup 2)-(phenylmethyl)- 2-N-Methyl-N-benzylamino-4-(2'-di-isopropylamino)ethylamino-5-methylthio-6-chloropyrimidine 55417-00-0