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参考文献
El-Ahl, Abdel-Aziz S.; Elmorsy, Saad S.; Elbeheery, Akram H.; Amer, Fathy A. Tetrahedron Letters, 1997 , vol. 38, # 7 p. 1257 - 1260
El-Ahl, Abdel-Aziz S.; Elmorsy, Saad S.; Elbeheery, Akram H.; Amer, Fathy A. Tetrahedron Letters, 1997 , vol. 38, # 7 p. 1257 - 1260