... S 4,42 (q, J 7.5 II/,, Cll2), « 7.34 (d of d. ]4,5 Í1.0 II/,, ,|5.6 4.5 II/,. ... 4507(1967); A, Sakurai and M. Goto, ibid., 2941 ( I 968). (4) A. Burger in "Medicinal Chemistry," Pari I, A. Burger, Ed., Wilcy-Intcrsciciiec. ... (6) SW Schneller and FW (Tough,,/. Heterocyclic ('.hem., 11, 975 (1974). ...