1. Traversa U, et al. Rat brain guanosine binding site. Biological studies and pseudo-receptor construction. Bioorg Med Chem. 2003 Dec 1;11(24):5417-25. 2. Kikugawa K, et al. Platelet aggregation inhibitors. 2. Inhibition of platelet aggregation by 5'-, 2-, 6-, and 8-substituted adenosines. J Med Chem. 1972 Apr;15(4):387-90.