A 60-year-old man complains of fever, significant weight loss, bone and joint pain, bleeding gums. Examination revealed paleness, lymphadenopathy, hepato- and splenomegaly. CBC: WBC - 270 × 109/l with 13% lymphocytes, 1% monocytes, 21% basophiles, 29% neutrophils, 9% blasts, 12% promyelocytes, 12% myelocytes, 2% metamyelocytes, 1% eosinophils. ESR -22 mm/h. Name the drug for treatment: