Phase 3 Randomized, Open-Label Study of Guadecitabine vs Treatment Choice in Previously Treated Acute Myeloid Leukemia

Multicenter, randomized, open-label, parallel-group study of guadecitabine vs treatment choice (TC). Participants will be randomly assigned in a 1:1 ratio to either guadecitabine or TC. TC options include the 8 high or low intensity, locally available regimens below; or Best supportive Care (BSC) alone: * High intensity (intermediate or high dose cytarabine \[HiDAC\]; mitoxantrone, etoposide, and cytarabine \[MEC\]; or fludarabine, cytarabine, granulocyte colony stimulating factor \[G-CSF\], +/- idarubicin \[FLAG/FLAG-Ida\]). * Low intensity (low dose cytarabine \[LDAC\], decitabine, or azacitidine). * BSC.