摘要:
SAR studies of a series of piperazinebenzylamines resulted in identification of potent agonists and antagonists of the human melanocortin-4 receptor. Thus, the 1,2,3,4-tetrahydroisoquinolin-1-ylacetyl compound 12e and the quinolin-3-ylcarbonyl analogue 121 possessed K(i) values of 6.3 and 4.5nM, respectively. Interestingly, 12e was a full agonist with an EC(50) value of 31 nM. and 121 was a weak partial agonist (IA = 17%) and functioned as an antagonist (IC(50) = 300 nM). (C) 2004 Elsevier Ltd. All rights reserved.