... 1993 American Chemical Society Page 2. CCK-B Receptor Activity of Boc-CCK, Derivatives ... N(CH& was synthesized by coupling Z-1Nal-OH with Journal of Medicinal Chembtry, 1993, Vol. 36, No. 1 167 ... urnal of Medicinal Chemistry, 1993, Vol. 36, NO. 1 168 Table 11. ...