1-((3-(4-Chlorophenethyl)-1,2,4-oxadiazol-5-yl)methyl)-7-methyl-1H-purin-6(7H)-one, 1-[[3-[2-(4-Chlorophenyl)ethyl]-1,2,4-oxadiazol-5-yl]methyl]-1,7-dihydro-7-methyl-6H-Purin-6-one, AM 0902, AMG0902
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AM-0902 (AMG0902) is a potent and selective transient receptor potential A1 (TRPA1) antagonist (rat/human TRPA1 IC50 = 71/131 nM against AITC-induced 45Ca2+ influx in respective CHO transfectants with [AITC] = EC90 = 3 μM/hTRPA1 or 35 μM/rTRPA1; human/rat IC50 = 24/20 nM by FLIPR) with little potency against human TRPV1/4, human CYP3A4/2D6, rat TRPV1/3, rat TRPM8, or mouse NaV1.7. AM-0902 effectively reduces AITC-induced flinching in a rat pain model (by 65% and 85%, respectively, with 10 or 30 mg/kg AM-0902 p.o. 1 hr prior to AITC injection) with good pharmacokinetic properties, oral availability and brain exposure (F = 60%, B/P = 0.2; 30 mg/kg p.o. in rats) in vivo.
Brain-penetrant, orally active, potent and selective transient receptor potential A1 (TRPA1) antagonist with efficacy against AITC-induced flinching in rats in vivo.