(untitled) - Krapcho,J.; Turk,C.; Cushman,D.W.; Powell,J.R.; DeForrest,J.M.; Spitzmiller,E.R.; Karanewsky,D.S.; Duggan,M.; Rovnvak,G.; Schwartz,J.; Natarajan,S.; Godfrey,J.D.; et al. (J Med. Chem., 1988)