Shrestha, Suja; Bhattarai, Bharat Raj; Lee, Keun-Hyeung; Cho, Hyeongjin
Bioorganic and Medicinal Chemistry, 2007 , vol. 15, # 20 p. 6535 - 6548

Jules et al.
Journal of the American Pharmaceutical Association (1912-1977), 1956 , vol. 45, p. 277,279,280