Entacapone-d10

Entacapone-d10 is intended for use as an internal standard for the quantification of entacapone (Cay-14153) by GC- or LC-MS. Entacapone is a reversible catechol O-methyltransferase (COMT) inhibitor (IC50s = 10, 10, 20, and 160 nM for rat duodenum, brain, erythrocyte, and liver COMT, respectively). It is selective for COMT over monoamine oxidase A (MAO-A) and MAO-B and phenolsulphotransferase M (PST-M) and PST-P (IC50s = >50 µM). Entacapone (10 mg/kg), in combination with L-DOPA (Cay-13248) and carbidopa (Cay-23783), reduces 3-O-methyldopa (3-OMD) levels in the rat striatum and hypothalamus to 52 and 27%, respectively, of the levels in control animals receiving only L-DOPA and carbidopa. In a 6-OHDA rat model of Parkinson's disease, entacapone (10 mg/kg), in combination with L-DOPA and benserazide (Cay-20298), increases contralateral turning behavior and striatal extracellular dopamine levels. Entacapone also inhibits contraction of colon longitudinal muscle explants from a 6-OHDA rat model of Parkinson's disease (EC50 = 200 µM). Formulations containing entacapone have been used in the treatment of Parkinson's disease.Formal Name: 2E-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-di-(ethyl-d5)-2-propenamide. CAS Number: 1185241-19-3. Synonyms: OR-611-d10. Molecular Formula: C14H5D10N3O5. Formula Weight: 315.4. Purity: >99% deuterated forms (d1-d10). Formulation: (Request formulation change), A crystalline solid. Solubility: DMSO: Slightly soluble, Methanol: Slightly soluble. SMILES: N#C/C(=C\c1cc(O)c(O)c(c1)[N+](=O)[O-])/C(=O)N(C([2H])([2H])C([2H])([2H])[2H])C([2H])([2H])C([2H])([2H])[2H]. InChi Code: InChI=1S/C14H15N3O5/c1-3-16(4-2)14(20)10(8-15)5-9-6-11(17(21)22)13(19)12(18)7-9/h5-7,18-19H,3-4H2,1-2H3/b10-5+/i1D3,2D3,3D2,4D2. InChi Key: JRURYQJSLYLRLN-YFIMXNTNSA-N.