Institution: | (1) Forschungsabteilung der F. Hoffmann-LaRoche and Co. AG, Basel, Schweiz;(2) The Robert Robinson Laboratories, University of Liverpool, England;(3) School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan;(4) Present address: Hoffmann-La Roche Inc., Nutley 10, N.J., USA |