Cappi, Michael W.; Moree, Wilna J.; Qiao, Lei; Marron, Thomas G.; Weitz-Schmidt, Gabriele; Wong, Chi-Huey Bioorganic and Medicinal Chemistry, 1997, vol. 5, # 2 p. 283 - 296 doi: 10.1016/S0968-0896(96)00236-2