参考文献:
Allen, Daniel Callaghan, Owen Cordier, Frederic L. Dobson, David R. Harris, John R. Hotten, Terry M. Owton, W. Martin Rathmell, Richard E. Wood, Virginia A. Tetrahedron Letters, 24 , vol. 45, # 52 p. 9645 - 9647
参考文献:
Hansen, Marvin Martin He, John Xiaoqiang Honigschmidt, Nicholas Allan Koch, Daniel James Kohn, Todd Jonathan Rocco, Vincent Patrick Spinazze, Patrick Gianpietro Takeuchi, Kumiko Patent: US24/6229 A, 24 Location in patent: Page/Page column 38 US 246229 A