Wnuk, Stanislaw F.; Mao, Yue; Yuan, Chong-Sheng; Borchardt, Ronald T.; Andrei, Graciela; Balzarini, Jan; De Clercq, Erik; Robins, Morris J. Journal of Medicinal Chemistry, 1998, vol. 41, # 16 p. 3078 - 3083 doi: 10.1021/jm9801410