(untitled) - Cheng,J.B.; Cooper,K.; Duplantier,A.J.; Eggler,J.F.; Kraus,K.G.; Marshall,S.C.; Marfat,A.; Masamune,H.; Shirley,J.T.; Tickner,J.E.; Umland,J.P. (Bioorg. Med. Chem. Lett., 1995)