Evaluation of Absorption, Metabolism, and Excretion and Estimation of the Absolute Bioavailability of K-312

Inclusion Criteria: * Subject provides written informed consent before any study-specific evaluation is performed. * Subject is a healthy adult male between the ages of 25 and 45 years, inclusive. * Subject has a body mass index (BMI) of 18.5 to 30 kg/m2, inclusive. Exclusion Criteria: * Presence of active or recurring clinically significant cardiovascular, pulmonary, renal, endocrine, hepatic, neurologic, psychiatric, immunologic, hematologic, gastrointestinal, or metabolic disease requiring medical treatment. * Any surgical or medical condition that might significantly alter the absorption, distribution, metabolism, or excretion of K-312. * Clinically relevant abnormalities in clinical laboratory parameters, as judged by the Investigator.