Abstract
In oriental medicine, it is well known that Angelica gigantis tonifies and harmonizes the blood, regulates the menses, and moistens the intestines. This herb has been used for deficient blood pattern, menstural problem, abdominal pain, and traumatic injuries in oriental medicine. A major component of Angelica gigantic consist of a various coumarines, decursin, schooltime, umbelliferone, safrole, 3-butylphalide sistesterol. In this study, we aimed to measure the contents of decursin, one of major coumarine derivative, to determine the standardization of Angelica gigantis.