This will be a dose block-randomized, double-blind, active and placebo controlled, single and multiple dosing, dose-escalation study to evaluate tolerability, safety and pharmacokinetic / pharmacodynamic characteristics. Adverse events, physical examinations, vital signs, ECG and laboratory tests will be conducted for safety/tolerability evaluation and serial blood samples and urine collections for pharmacokinetic and pharmacodynamic evaluations will be conducted at specified time points.

Inclusion Criteria:

1. Healthy male subjects between the ages of 20 and 50 years at screening
2. Subjects with Body Mass Index (BMI) between 18.0 (inclusive) and 27.0 kg/m2 (exclusive); and a total body weight between 55 kg (inclusive) and 90 kg (exclusive). ☞ BMI (kg/m2) = body weight (kg)/ {height (m)}2.
3. Subject is informed of the investigational nature of this study and voluntarily agrees to participate in this study and signs an Institutional Review Board (IRB) - approved informed consent prior to performing any of the screening procedures.
4. Findings within the range of clinical acceptability in medical history and physical examination, and laboratory results within the laboratory reference ranges for the relevant laboratory tests