Synonyms: s-Triazolo[1,5-a]pyrimidin-5(4H)-one,2-amino-6-methyl-4-propyl- (8CI); 2-Amino-6-methyl-4-propyl-4H-[1,2,4]triazolo[1,5-a]pyrimidin-5-one;2-Amino-6-methyl-4-propyl-s-triazolo[1,5-a]pyrimid-5(4H)-one;2-Amino-6-methyl-5-oxo-4-propyl-4,5-dihydro-s-triazolo[1,5-a]pyrimidine; ICI63197