1. Tengö, J.: Zoon7, 15 (1979)
2. Tengö, J., Bergström, G.: Comp. Biochem. Physiol.55 B, 179 (1976);57 B, 197 (1977)
3. An LKB 2091 GC/MS system was used: 25-m glass-capillary column with Silicone OV-101. The isolation, injection and separation procedures have been described by Bergström, G., in: Proc. Symp. IUSSI, Dijon 1975, p. 197
4. Francke, W., et al.: Naturwissenschaften64, 590 (1977)
5. Francke, W., Hindorf, G., Reith, W.: ibid.