Song, Hyeseung; Lee, Yun Suk; Roh, Eun Joo; Seo, Jae Hong; Oh, Kwang-Seok; Lee, Byung Ho; Han, Hogyu; Shin, Kye Jung Bioorganic and Medicinal Chemistry Letters, 2012 , vol. 22, # 17 p. 5668 - 5674