... Elemental analyses were performed in the Department of Medicinal Chemistry, University of Kansas ... 1 H, J1 = 7, Jz = 21, 4.46 (dt, 1 H, J1 = 7,J2 = 4), 3.55 (dd, 1 H, J1 = 3.5, J z = 2), 3.35 (ddd, 1 H, J1 = 7, J z = 3.5 ... The organic layer was separated, dried (Na#04), and concentrated ...