(untitled) - Norbeck,D.W.; Kern,E.; Hayashi,S.; Rosenbrook,W.; Sham,H.; Herrin,T.; Plattner,J.J.; Erickson,J.; Clement,J.; Swanson,R.; Shipkowitz,N.; Hardy,D.; et al. (J. Med. Chem., 1990)