Qu, Bo; Haddad, Nizar; Han, Zhengxu S.; Rodriguez, Sonia; Lorenz, Jon C.; Grinberg, Nelu; Lee, Heewon; Busacca, Carl A.; Krishnamurthy, DhileepKumar; Senanayake, Chris H. Tetrahedron Letters, 2009 , vol. 50, # 45 p. 6126 - 6129