Subasinghe, Nalin L.; Lanter, James; Markotan, Thomas; Opas, Evan; McKenney, Sandra; Crysler, Carl; Hou, Cuifen; O'Neill, John; Johnson, Dana; Sui, Zhihua Bioorganic and Medicinal Chemistry Letters, 2013 , vol. 23, # 4 p. 1063 - 1069