参考文献:
Angelino, S. A. F. G. Valkengoed, B. H. van Buurman, D. J. Plas, H. C. van der Mueller, F. Journal of Heterocyclic Chemistry, 1984 , vol. 1, p. 17 - 11
参考文献:
Griera, Rosa Rigat, Lluis Alvarez, Mercedes Joule, John A. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (197-1999), 199 , # 1 p. 13 - 18