TGRX-326 Pharmacokinetic Mass Balance

Prior treatment

• Usage of inducer or inhibitor drugs to drug metabolism with 30 days prior to screening
• Usage of any prescription or non-prescription drug, Chinese herbal medicine or dietary supplements
• Reception of major surgery within 6 months before screening, or surgical wounds not completely healed
• Presence of allergic reactions or may be allergic to ingredients in the investigational drug
• Alcohol abuse or excessive alcohol consumption within 6 months before screening
• Excessive smoking within 3 months before screening
• Participation in any other clinical studies within 3 months before screening
• Reception of vaccine within 1 months before screening, or planning to be vaccinated during the study
• Blood donation or blood loss of \> 400 ml within 3 months before screening; blood donation or blood loss of \> 200 ml within 1 month before screening; reception of blood transfusion within 1 months before screening, or planning to donate blood within 3 months after study completion

Other illness

• Positive results on hepatitis, HIV or syphilis
• Presence of any significant medical history or clinical conditions that could affect study results per investigators' judgement
• Presence of any condition that could affect drug absorption
• Presence of hemorrhoids, or having history of or is having conditions that cause bloody feces
• History of long-term exposure under radiation; or significant radiation exposure 1 year before this study; or participation in other radioactive drug studies
• Having difficulties to receive venous needle puncture, or cannot tolerate venous needle puncture, or history of hematophobia or needle sickness
• Any conditions that the investigator deemed unfit for the study

Other

• Clinically significant results from comprehensive physical and clinical examinations
• Clinically significant results from eye examination
• Habitual congestion or diarrhea
• Substance abuse or positive results on urine substance test
• Habits of grapefruit juice consumption or excessive caffeinated drinks consumption
• Planning to have children or donate sperms during the study and within 1 year after the study, or Not agreeing to take contraceptive measures during and within 1 year after study completion
• Having special dietary requirements and unable to follow the uniform dietary plan in the study

• Healthy adult males
• Age between 18 and 45 years old (both limits included)
• Body weight index between 19.0 and 26.0 kg/m2 (both limits included), and body weight not less than 50.0kg
• Willing to consent
• Able to communicate with investigator and complete study according to study protocol