Study to Evaluate PK and Safety With Uproleselan Combined With Chemotherapy to Treat Chinese R/R AML Patients

Inclusion Criteria:

1. ≥18 years and ≤60 years in age
2. AML (including secondary AML) diagnosed as per WHO standards (2008).
3. For refractory AML, only cytarabine/daunorubicin(or Idarubicin) as can be applied repeatedly(maximal twice) as induction, no other chemotherapy are allowed to be applied Venatoclax /hypomethylation drug \[HMA\] can be used before and after chemotherapy.

   1. For relapse AML, it must be the first or second relapse, and remain untreated.
   2. Certain regimens (Venatoclax/HMA, Venetoclax/LDAC, HMA single agent) and FLT3 inhibitors, tyrosine kinase inhibitors, IDH1/IDH2 inhibitors or similar targeted inhibitors used alone are not considered cytotoxic chemotherapy are allowed.
4. ECOG performance status score is 0 to 2.
5. Stable hemodynamics and good organ function.

Exclusion Criteria:

1. Patients with acute promyelocytic leukemia, acute leukemia of ambiguous lineage (biphenotypic leukemia), chronic myeloid leukemia with myeloid blast crisis, or secondary refractory AML.
2. Active signs or symptoms of CNS involvement by malignancy.
3. Stem cell transplantation ≤4 months prior to dosing.
4. Any immunotherapy or radiotherapy therapy within 28 days of dosing; any other experimental therapy or chemotherapy within 14 days of dosing.
5. Prior use of G-CSF, CM-CSF or plerixafor within 7 days of dosing.
6. Inadequate organ function.
7. Abnormal liver function.
8. Known active infection with hepatitis A, B, or C, or human immunodeficiency virus.
9. Moderate kidney dysfunction (glomerular filtration rate \<45 mL/min).
10. Uncontrolled acute life-threatening bacterial, viral, or fungal infection.
11. Clinically significant cardiovascular disease.
12. Major surgery within 4 weeks of dosing.