Comin, Maria J.; Agbaria, Riad; Ben-Kasus, Tsipi; Huleihel, Mahmoud; Liao, Chenzhong; Sun, Guangyu; Nicklaus, Marc C.; Deschamps, Jeffrey R.; Parrish, Damon A.; Marquez, Victor E. Journal of the American Chemical Society, 2007, vol. 129, # 19 p. 6216 - 6222 doi: 10.1021/ja0688732