Lee, Jeewoo; Kang, Sang Uk; Kim, Su Yeon; Kim, Sung Eun; Kang, Mee Kyoung; Jo, Yeong Joon; Kim, Sunghoon Bioorganic and Medicinal Chemistry Letters, 2001, vol. 11, # 8 p. 961 - 964 doi: 10.1016/S0960-894X(01)00095-6