Maligres, Peter E.; Houpis, Ioannis; Rossen, Kai; Molina, Audrey; Sager, Jess; Upadhyay, Veena; Wells, Kenneth M.; Reamer, Robert A.; Lynch, Joseph E.; Askin, David; Volante; Reider, Paul J.; Houghton, Peter Tetrahedron, 1997 , vol. 53, # 32 p. 10983 - 10992