参考文献

Boos, Charles; Bowles, Daniel M.; Cai, Cuiman; Casimiro-Garcia, Agustin; Chen, Xiangyang; Hulford, Catherine A.; Jennings, Sandra M.; Jason Kiser; Piotrowski, David W.; Sammons, Matthew; Wade, Robert A. Tetrahedron Letters, 2011 , vol. 52, # 52 p. 7025 - 7029