References
- Ueno , Y. , Aoki , S. and Okawara , M. 1980 . J. C. S. Chem. Comm. , : 683
- Thomas , A. F. 1973 . The Total Synthesis of Natural Products Edited by: ApSimon , J. and Wiley , J. Vol. 2 , 43 For earlier syntheses see in, Ed., N. Y.
- Adams , D. R. and Bhatnagar , S. P. 1977 . Synthesis , : 661