Goehring, R. Richard; Whitehead, John F.W.; Brown; Islam, Khondaker; Wen, Xin; Zhou, Xiaoming; Chen, Zhengming; Valenzano, Kenneth J.; Miller, Wendy S.; Shan, Shen; Kyle, Donald J. Bioorganic and Medicinal Chemistry Letters, 2004 , vol. 14, # 20 p. 5045 - 5050