1. For a recent review see Pritchard, M. C.; Raphy, J.; Singh, L. Exp. Opin. Invest. Drugs 1997, 6, 349.
2. (a) For an up to date review including studies on CCK1 receptor agonists see de Tullio, P.; Delarge, J. D.; Pirotte, B. Curr. Med. Chem. 1999, 6, 433.
3. (b) Most recent publication on CCK1 receptor agonists Bignon, E.; Bachy, A.; Boigegrain, R.; Brodin, R.; Cottineau, M.; Gully, D.; Herbert, J.; Keane, P.; Labie, C.; Molimard, J.; Olliero, D.; Oury-Donat, F.; Petereau, C.; Prabonnaud, V.; Rockstroh, M.; Schaeffer, P.; Servant, O.; Thurneyssen, O.; Soubrie, P.; Pascal, M.; Maffrand, J.; Le Fur, G. J. Pharmacol. Experimental Therapeutics 1999, 289, 742.
4. See Holladay, M. W.; Kopecka, H.; Miller, T. R.; Bednarz, L.; Nikkel, A. L.; Bianchi, B. R.; Witte, D. G.; Shiosaki, K.; Wel Lin, C.; Asin, K. E.; Nadzan, A. M. J. Med. Chem. 1994, 37, 630 and references cited therein.
5. (a) Bourne, G. T.; Horwell, D. C.; Pritchard, M. C. Bioorg. Med. Chem. Lett. 1993, 3, 889.