Synthesis, resolution and discriminative stimulus studies of the β-series stereoisomers of 2,2-diphenyl-4-(2-piperidyl)-1,3-dioxolane: Zenk,∗1 P. C., E. L. May,∗ R. L. Balster∗ and J. V. Silverton.† ∗Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, VA 23298; and †National Heart, Lung, Blood Institute, National Institute of Health, Bethesda, MD 20892