Richard, David J.; Verheijen, Jeroen C.; Curran, Kevin; Kaplan, Joshua; Toral-Barza, Lourdes; Hollander, Irwin; Lucas, Judy; Yu, Ker; Zask, Arie Bioorganic and Medicinal Chemistry Letters, 2009 , vol. 19, # 24 p. 6830 - 6835