Song, Yu Min; Ha, Young Mi; Kim, Jin-Ah; Chung, Ki Wung; Uehara, Yohei; Lee, Kyung Jin; Chun, Pusoon; Byun, Youngjoo; Chung, Hae Young; Moon, Hyung Ryong Bioorganic and Medicinal Chemistry Letters, 2012 , vol. 22, # 24 p. 7451 - 7455