(untitled) - Batt,D.G.; Copeland,R.A.; Dowling,R.L.; Gardner,T.L.; Jones,E.A.; Orwat,M.J.; Pinto,D.J.; Pitts,W.J.; Magolda,R.L.; Jaffee,B.D. (Bioorg. Med. Chem. Lett., 1995)