References
- Ribi , M. , Chang , A. , Sin-Ren Küng , H. P. and Eugster , C. E. 1969 . Helv. Chim. Acta , 52 : 1685
- Parish , E. J. , Huang , B. S. and Miles , D. H. 1975 . Synth. Commun. , : 341
- Burnell , R. H. , Andersen , A. , Néron-Desbiens , M. and Savard , S. 1981 . Can. J. Chem. , 59 : 2820
- The synthetic material was compared with an authentic sample most kindly provided by Professor C. H. Eugster (Zürich)