Perchonock; Lantos; Finkelstein; Holden
Journal of Organic Chemistry, 1980 , vol. 45, # 10 p. 1950 - 1953

Bondinell; Chapin; Girard; Kaiser; Krog; Pavloff; Schwartz; Silvestri; Vaidya; Lam; Wellman; Pendleton
Journal of Medicinal Chemistry, 1980 , vol. 23, # 5 p. 506 - 511