Hajjaj H.M. Abdu-Allah, Kozo Watanabe, Koji Hayashizaki, Yuki Iwayama, Hiromu Takematsu, Yasunori Kozutsumi, Takeshi Tsubata, Hideharu Ishida and Makoto Kiso
Tetrahedron Letters 50 ( 31 ): 4488 - 4491 , 2009