Ro 5212773

• CAT Number: R024326
• CAS Number: 1110781-88-8
• Molecular Formula: C20H21F3N2O2
• Molecular Weight: 378.39
• Purity: ≥95%
• Synonyms: N-(3-ethoxyphenyl)-4-pyrrolidin-1-yl-3-(trifluoromethyl)benzamide
• InChI: InChI=1S/C20H21F3N2O2/c1-2-27-16-7-5-6-15(13-16)24-19(26)14-8-9-18(25-10-3-4-11-25)17(12-14)20(21,22)23/h5-9,12-13H,2-4,10-11H2,1H3,(H,24,26)
• InChIKey: KLFVWQCQUXXLOU-UHFFFAOYSA-N
• SMILES: CCOC1=CC=CC(=C1)NC(=O)C2=CC(=C(C=C2)N3CCCC3)C(F)(F)F

Ro 5212773 (EPPTB) is a potent and selective trace amine-associated receptor 1 (TAAR1) antagonist (Ki=0.9 nM for mouse TAAR1), with no significant effects on other TAARs. TAAR1 is a G protein-coupled receptor (GPCR) that is nonselectively activated by endogenous metabolites of amino acids[1][2].
Ro 5212773 (EPPTB) suppresses the excitability of hippocampal pyramidal neurons. EPPTB also reduceds seizure-like events (SLEs) and seizure activity[1].
Ro 5212773 blocks the TAAR1-mediated activation of an inwardly rectifying K+ current[2].
Ro 5212773 potently antagonizes cAMP production induced by activating mouse TAAR1 with 1.5 μM β-phenylethylamine (IC50=27.5 nM). cAMP levels are dose-dependently reduced by Ro 5212773 in HEK293 cells in the absence of TAAR1 agonist (IC50= 19 nM). EPPTB is significantly more potent in antagonizing cAMP production by mouse, as compared to rat (IC50= 4539 nM) and human (IC50= 7487 nM) TAAR1[2].

Reference

[1]. Bradaia A, et al. The selective antagonist EPPTB reveals TAAR1-mediated regulatory mechanisms in dopaminergic neurons of the mesolimbic system. Proc Natl Acad Sci U S A. 2009;106(47):20081-20086.
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