Hanessian, Stephen; Huynh, Hoan K.; Reddy, Gurijala V.; McNaughton-Smith, Grant; Ernst, Beat; Kolb, Hartmuth C.; Magnani, John; Sweeley, Charla Bioorganic and Medicinal Chemistry Letters, 1998, vol. 8, # 19 p. 2803 - 2808 doi: 10.1016/S0960-894X(98)00500-9