... [15] S. Lindström, T. Ahmad and S. Grivas, Heterocycles, 38, 529, (1994). ... [20] MJ Tanga, WW Bradford, JE Bupp and JA Kozocas, J. Heterocycl. Chem., 40, 569, (2003). [21] S. Grivas, in Food Borne Carcinogens: Heterocyclic Amines, M. Nagao and T. Sugimura, ed, John ...