A Single Ascending Dose Clinical Trial to Find the Maximum Tolerable Dose of HL237 in Healthy Male Subject

Inclusion Criteria: * A healthy adult male aged 20 years or older and 45 years old at the time of the screening test * Those who weigh more than 55kg but weigh less than ± 20% of ideal body weight * Proper contraception during the clinical trial period * After hearing the detailed explanation of the clinical trial, those who decide to participate voluntarily and write agreement Exclusion Criteria: * Clinically significant, a person with a history of neurological, psychiatric, malignant, cardiovascular, respiratory, kidney, endocrine, hematologic, digestive or central disease * a person with a history of gastrointestinal disorders that may affect the absorption of pharmaceuticals for clinical trials (Crohn's disease, ulcers, etc.) or gastrointestinal surgery (except for simple cecal surgery or hernia surgery) * a person with a history of hypersensitivity or clinically significant hypersensitivity to the clinical trial drug or additives * a person judged to be inappropriate for the subject by health screening (history of disease, physical examination, vital signs, electrocardiogram, laboratory test, etc.)