Lee, Hyunil; Lee, Jinho; Lee, Sangkyun; Shin, Youseung; Jung, Wonhee; Kim, Jong-Hyun; Park, Kiwon; Kim, Kwihwa; Cho, Heung Soo; Ro, Seonggu; Lee, Sunhwa; Jeong, ShinWu; Choi, Taesaeng; Chung, Hyun-Ho; Koh, Jong Sung Bioorganic and Medicinal Chemistry Letters, 2001 , vol. 11, # 23 p. 3069 - 3072