Synonyms: Pyrimidine, 2,4-diamino-6-chloro- (6CI,7CI,8CI), 6-Chloro-2,4-pyrimidinediamine, 2,4-Diamino-6-chloropyrimidine, 2,6-Diamino-4-chloropyrimidine, 4-Chloro-2,6-diaminopyrimidine, 6-Chloro-2,4-diaminopyrimidine, 6-Chloropyrimidine-2,4-diamine, NSC 8818