4-methyl-1-(4-((4-methyl-3-((4-(pyridin-3-yl)pyrimidin-2-yl)amino) phenyl) carbamoyl)benzyl) piperazine 1-oxide,4-methyl-1-(4-((4-methyl-3-((4-(pyridin-3-yl)pyrimidin-2-yl)amino) phenyl) carbamoyl)benzyl) piperazine 1-oxide,Impurity in commercial preparations of Imatinib.,Imatinib Therapeutic