Imatinib Bis Impurity

Chemical Name: Des(methylpiperazinyl-N-methyl) Imatinib Dimer Impurity; 1,4-Bis-[4-[4-methyl-3-[[4-(pyridin-3-yl)pyrimidin-2-yl]amino]phenyl]carbamoyl]benzylpiperazine;

Synonym: Oxybutynin USP RC C ; 4-(ethylmethylamino)but-2-ynyl (RS)-2-cyclohexyl-2-hydroxy-2-phenylacetate (methylethyl analogue of oxybutynin),