A Study of SR-8541A (ENPPI Inhibitor) in Advanced/Metastatic Solid Tumors

Inclusion Criteria:

1. Life expectancy of at least 3 months

2. Eastern Cooperative Oncology Group (ECOG) performance status 0 - 1

3. Histopathologically/cytologically confirmed advanced solid tumor, which isrefractory to standard therapeutic options, or for which there are no standardtherapeutic options.

4. Measurable disease per RECIST v1.1

5. Willing to provide archival or fresh tumor tissue during screening (required) andpost-treatment (optional)

6. Adequate hematologic, renal and hepatic function

Exclusion Criteria:

1. Primary central nervous system (CNS) tumor

2. Prior systemic anti-cancer treatment including other investigational agents,surgery, or radiation within 28 days or 5 half-lives, whichever is less

3. Continuous systemic treatment with either corticosteroids (>10 milligram [mg] dailyprednisone equivalents) or other immunosuppressive medications within 28 days

4. Active autoimmune disease that has required systemic treatment in past 2 years

5. History of documented congestive heart failure (New York Heart Association [NYHA]class II - IV); unstable angina; poorly controlled hypertension; clinicallysignificant valvular heart disease; high-risk uncontrolled arrhythmias (includingsustained ventricular tachycardia); myocardial infarction, unstable angina,cerebrovascular accident, or transient ischemic attack within the last 6 months, orCanadian Cardiovascular Society angina class > 2

6. Troponin I > ULN

7. Blood pressure (BP) - Systolic < 95 mmHg or > 160 mmHg or diastolic > 100 mmHg

8. Resting heart rate (HR) > 100 beats per minute (BPM)

9. Corrected QT interval by Fridericia (QTcF) ≥ 470 ms

10. Left Ventricular Ejection Fraction (LVEF) < 50%

11. Symptomatic uncontrolled CNS disease requiring treatment with steroids oranti-seizure medications within 2 months

12. Leptomeningeal disease

13. Spinal cord compression not definitively treated with surgery and/or radiation orpreviously diagnosed and treated spinal cord compression without evidence thatdisease has been clinically stable for at least 8 weeks

14. Bleeding diathesis due to underlying medical condition or anticoagulation medicationwhich is unable to be promptly reversed by medical treatment

15. Prior additional malignancy that is progressing or has received treatment theprevious 3 years

16. Active infection requiring systemic treatment

17. Positive for human immunodeficiency virus (HIV) (HIV antibodies) or active hepatitisB (e.g., HbsAg reactive) or active hepatitis C (e.g., HCV ribonucleic acid [RNA]qualitative) infection with detectable viral load

18. Major surgery within 28 days prior to Day 1 and/or minor surgery (excluding biopsy)within 7 days