摘要:
A series of TRPV1 agonists with amide, reverse amide, and thiourea groups in the B-region and their corresponding alpha-methylated analogues were investigated. Whereas the alpha-methylation of the amide B-region enhanced the binding affinities and potencies as agonists, that of the reverse amide and thiourea led to a reduction in receptor affinity. The analysis indicated that proper hydrogen bonding as well as steric effects in the B-region are critical for receptor binding. (c) 2012 Elsevier Ltd. All rights reserved.