Khan, Md. Iqbal Hassan; Kim, Hyeung; Ashida, Hiroyuki; Ishikawa, Takahiro; Shibata, Hitoshi; Sawa, Yoshihiro
Bioscience, Biotechnology and Biochemistry, 2005 , vol. 69, # 9 p. 1802 - 1805

Baldwin, Jack E.; Dyer, Robert L.; Ng, Si C.; Pratt, Andrew J.; Russell, Mark A.
Tetrahedron Letters, 1987 , vol. 28, # 32 p. 3745 - 3746