AcBut-N-Ac-γ-Calicheamicin is an ADC cytotoxic payload that induces cell cycle arrest and apoptosis by causing DNA double-strand breaks. AcBut-N-Ac-γ-Calicheamicin is primarily used in the synthesis of antibody-drug conjugates (ADC) and holds promise for research in the field of cancer, including acute lymphoblastic leukemia (ALL) and other hematological malignancies.