(untitled) - Adlington,R.M.; Baldwin,J.E.; Chen,B.; Cooper,S.L.; McCoull,W.; Pritchard,G.J.; Howe,T.J.; Becker,G.W.; Hermann,R.B.; McNulty,A.M.; Neubauer,B.L. (Bioorg. Med. Chem. Lett., 1997)