1. College of Korean Medicine, Gachon University, Seongnam 461-701, South Korea
2. KIST Gangneung Institute of Natural Products, Korea Institute of Science and Technology (KIST), Gangneung 210-340, South Korea
3. Laboratory of Molecular Oncology, Cheil
General Hospital and Women’s Healthcare Center, Dankook University College of Medicine, Seoul 100-380, South Korea
4. Richwood Pharmaceutical Company, Limited, Seoul 100-704, South Korea