Inclusion Criteria:  Healthy adult males aged between 19 and 55 at screening Those whose weight is between 55 and 90 kg and BMI is between 18.0 and 30.0 Those who are adequate to be subjects in this study upon judgment of the investigator after physical examination, clinical laboratory test, examination by interview, etc Signed informed consent form  Exclusion Criteria:  Those who have clinical significant liver, kidney, nervous system, respiratory, endocrine, hematology and oncology, cardiovascular, urinary, and mental diseases or past history Those who have gastrointestinal diseases or past history of gastrointestinal diseases that may affect safety and pharmacokinetic/pharmacodynamic evaluation of study drug, and those who have past history of gastrointestinal surgery (however, except simple appendectomy and herniotomy)  A person who shows any of the following results in vital signs at the time of screening  Systolic blood pressure below 90 mmHg or above 140 mmHg diastolic blood pressure less than 50 mmHg or greater than 90 mmHg Pulse rate less than 50 beats per minute or more than 90 beats per minute  A person who exhibits any of the following results from a 12-lead ECG test at the time of screening:  PR > 210 msec QRS complex > 120 msec QTcB > 450 msec  A person who exhibits any of the following results in a clinical laboratory examination at the time of screening ;  glomerular filtration rate (eGFR, CKD-EPI) < 60 mL/min/1.73 m2 WBC count < 3500/μL Absolute neutrophil count (ANC) < 1500/μL AST/ALT > 1.5 X ULN Those who have a history of tuberculosis infection or who have confirmed positive tuberculosis infection as a result of the Quantiferon TB-Gold test and Chest X-ray performed at the screening test Persons with acute infectious diseases including herpes virus infection, herpes simplex, and herpes zoster  Other protocol-defined inclusion/exclusion criteria may apply.