Imatinib Guanidine Impurity;|Imatinib Guanidino Impurity ; N-(3-Guanidino-4-methylphenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide ; N-(3-Carbamimidamido-4-methylphenyl)-4-[(4-methylpiperazin-1-yl)methyl]benzamide ;|N-(3-carbamimidamido-4-methylphenyl)-4-[(4-methylpiperazin-1-yl)methyl]benzamide Dihydrochloride|N-(3-Carbamimidamido-4-methylphenyl)-4-[(4-methylpiperazin-1-yl)methyl]benzamide;|N-(3-Guanidino-4-methylphenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide;