Study of SGR-2921 in Relapsed/Refractory Acute Myeloid Leukemia or Myelodysplastic Syndrome

Inclusion Criteria:

≥ 18 years of age.
Life expectancy ≥ 8 weeks.
Confirmed diagnosis of R/R AML or High Risk (HR) and Very High Risk (VHR) MDS.
Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2.

Exclusion Criteria:

Active malignancies within two years prior to the first dose, or requiring ongoing treatment, not related to AML or MDS.
Clinical evidence of central nervous system (CNS) or pulmonary leukostasis, ≥ Grade 3 disseminated intravascular coagulation, or active CNS leukemia.
Use of experimental drug, or therapy, or anti-cancer therapy within 14 days or 5 half-lives of the first dose of study drug.
QT interval corrected for heart rate per Fridericia's formula ≥470 msec during screening ECG.