31. Preparation of substituted imidazopyridines for antagonizing gonadotropin releasing hormone activity.      Dossetter, Alexander Graham; Kenny, Peter; McKerrecher, Darren; Wardleworth, Michael.  (Astrazeneca AB, Swed.; Astrazeneca UK Limited).    PCT Int. Appl. (2002), 98 pp. WO2002066477A2