... 3479 Jan-E. Backvall,* Ruth E. Nordberg, and Jan-E. Nystrom Department of Organic Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden ... Department of CNS-Medicinal Chemistry, Astra Lakemedel AB, S-151 85 Sodertdlje, Sweden ... Page 2. 3480 J. Org. ...