Open, Single-dose/-Period Study to Assess Mass Balance Recovery, Metabolite Profile/Identification of 14C-Varlitinib

Inclusion Criteria: 1. Healthy males of non-Asian descent 2. Aged 30 to 65 years 3. Body mass index of 18.0 to 35.0 kg/m2 or, if outside the range, considered not clinically significant by the investigator 4. Must be willing and able to communicate and participate in the whole study 5. Must provide written informed consent 6. Must agree to use an adequate method of contraception (as defined in Section 9.4) 7. Must have regular bowel movements (ie, average stool production of ≥1 and ≤3 stools per day) 8. Subject is considered healthy on the basis of medical history, physical examination, ECG, vital signs and clinical laboratory assessments. Exclusion Criteria: 1. Subjects who have received any IMP in a clinical research study within the previous 3 months 2. Subjects who are study site employees, or immediate family members of a study site or sponsor employee 3. Subjects with pregnant partners 4. Subjects who have previously been enrolled in this study 5. History of any drug or alcohol abuse in the past 2 years 6. Regular alcohol consumption in males \>21 units per week (1 unit = ½ pint beer, 25 mL of 40% spirit or a 125 mL glass of wine) 7. Current smokers and those who have smoked within the last 12 months. A breath carbon monoxide reading of greater than 10 ppm at screening and admission 8. Users of e-cigarettes and nicotine replacement products and those who have used these products within the last 12 months 9. Radiation exposure, including that from the present study, excluding background radiation but including diagnostic x-rays and other medical exposures, exceeding 5 mSv in the last 12 months or 10 mSv in the last 5 years. No occupationally exposed worker, as defined in the Ionising Radiation Regulations 1999, shall participate in the study 10. Subjects who do not have suitable veins for multiple venepunctures/cannulation as assessed by the investigator at screening 11. Clinically significant abnormal biochemistry, haematology or urinalysis as judged by the investigator (laboratory parameters are listed in Appendix 1) 12. Neutrophil count \<1.8 x109/L at screening 13. ALT and AST \>1.25 x upper limit of normal range at screening 14. QT interval corrected for heart rate using Fridericia's formula (QTcF) \> 450 msec at screening 15. Positive drugs of abuse test result (drugs of abuse tests are listed in Appendix 1) 16. Positive hepatitis B surface antigen (HBsAg), hepatitis C virus antibody (HCV Ab) or human immunodeficiency virus (HIV) results 17. Evidence of renal impairment at screening, as indicated by an estimated creatinine clearance (CLcr) of \<80 mL/min using the Cockcroft-Gault equation 18. History of clinically relevant cardiovascular, renal, hepatic, chronic respiratory or Gl disease, neurological or psychiatric disorder, as judged by the investigator 19. History of clinically relevant dermatological disease (eg eczema, psoriasis, drug rashes) or the presence of dermatological conditions at screening (eg acne, eczema, dermatitis etc) 20. Subjects with a history of cholecystectomy or gall stones 21. Serious adverse reaction or serious hypersensitivity to any drug or the formulation excipients 22. Presence or history of clinically significant allergy requiring treatment, as judged by the investigator. Hayfever is allowed unless it is active 23. Donation or loss of greater than 400 mL of blood within the previous 3 months 24. Subjects who are taking, or have taken, any prescribed or over-the-counter drug or herbal remedies in the 14 days before IMP administration; with the exception of 4 g per day paracetamol \[see Section 11.4\]). Further exceptions may apply on a case by case basis, if considered not to interfere with the objectives of the study, as agreed by the PI and sponsor's medical monitor. 25. Failure to satisfy the investigator of fitness to participate for any other reason