Saygili, Nezire; Brown, R.James; Day, Peter; Hoelzl, Robert; Kathirgamanathan, Poopathy; Mageean, Eileen R; Ozturk, Turan; Pilkington, Melanie; Qayyum, Mohammed M.B; Turner, Scott S; Vorwerg, Lars; Wallis, John D Tetrahedron, 2001 , vol. 57, # 23 p. 5015 - 5026