4-((4-Methylpiperazin-1-yl)methyl)benzoyl Chloride Dihydrochloride is an intermediate in the synthesis of Gleevec N-4-((4-Methylpiperazin-1-yl)methyl)benzaldehyde (G407010), an impurity of Gleevec (G407000), a tyrosine kinase inhibitor which is highly specific for BCR-ABL, the enzyme associated with chronic myelogenous leukemia (CML) and certain forms of acute lymphoblastic leukemia (ALL).