Kim, Hee Jin; Cho, Hye Jung; Kim, Hwan; El-Gamal, Mohammed I.; Oh, Chang-Hyun; Lee, So Ha; Sim, Taebo; Hah, Jung-Mi; Yoo, Kyung Ho Bioorganic and Medicinal Chemistry Letters, 2012 , vol. 22, # 9 p. 3269 - 3273