1-Piperazineacetic acid, 4-[(3,4,5-trimethoxyphenyl)methyl]-, 4-methoxyphenyl ester

KB-5492 free base is a potent and selective inhibitor of sigma receptor, inhibits specific [3H]1,3-di(2-tolyl)guanidine (DTG) binding to the sigma receptor with an IC50 of 3.15 μM. KB-5492 free base is an anti-ulcer agent[1][2]. KB-5492 (0.001-100 μM) free base inhibits specific [3H]DTG binding in a concentration-dependent manner[1].KB-5492 (0.1-1 mM) free base significantly and concentration-dependently prevents the ethanol- and acidified aspirin-induced increases in 51Cr release from gastric epithelial cells[2]. KB-5492 (200 mg/kg; p.o.) free base prevents macroscopic lesions in the gastric mucosa[2].

[1]. Harada Y, et, al. Receptor binding profiles of KB-5492, a novel anti-ulcer agent, at sigma receptors in guinea-pig brain. Eur J Pharmacol. 1994 May 2; 256(3): 321-8.[2]. Morimoto Y, et, al. Effects of KB-5492, a new anti-ulcer agent, on ethanol- and acidified aspirin-induced gastric mucosal damage in vivo and in vitro. Jpn J Pharmacol. 1994 Jan; 64(1): 41-7.