Shimada, Kazuaki; Takata, Yukichi; Osaki, Yu; Moro-oka, Akiko; Kogawa, Hisashi; Sakuraba, Maiko; Aoyagi, Shigenobu; Takikawa, Yuji; Ogawa, Satoshi
Tetrahedron Letters, 2009 , vol. 50, # 48 p. 6651 - 6653