参考文献

Kapur, Ashish; Kumar, Kamal; Singh, Lakhwinder; Singh, Parminder; Elango, Munusamy; Subramanian, Venkatesan; Gupta, Vivek; Kanwal, Priyanka; Ishar, Mohan Paul S. Tetrahedron, 2009 , vol. 65, # 23 p. 4593 - 4603