參考文獻:
Ngu, Khehyong Weinstein, David S. Liu, Wen Langevine, Charles Combs, Donald W. Zhuang, Shaobin Chen, Xing Madsen, Cort S. Harper, Timothy W. Ahmad, Saleem Robl, Jeffrey A. Bioorganic and Medicinal Chemistry Letters, 2011 , vol. 21, # 14 p. 4141 - 4145