... Nils Gunnar Johansson. Department of Antiviral Chemotherapy, Research & Development Laboratories, Astra Läkemedel AB, S-151 85 Södertälje, Sweden. Received 18 November 1985, Available online 6 April 2001. Abstract. ... Unpublished results. 3; J. Kjellberg and NG Johansson. Manuscript submitted for publication in J. Heterocyclic Chem. 4; A. Yamazaki; Chem. Pharm. Bull., 17 (1969), p. 1268. 5; A. Larsson, S. Alenius, NG Johansson, B. Öberg; ...