Chung, John Y. L.; Ho, Guo-Jie; Chartrain, Michel; Roberge, Chris; Zhao, Dalian; Leazer, John; Farr, Roger; Robbins, Micheal; Emerson, Kateeta; Mathre, David J.; McNamara, James M.; Hughes, David L.; Grabowski, Edward J. J.; Reider, Paul J. Tetrahedron Letters, 1999 , vol. 40, # 37 p. 6739 - 6743