Odapipam  (Synonyms: NNC 756)

Odapipam (NNC 756) is a selective, high affinity and benzazepine dopamine D₁ receptor antagonist with a K_d of 0.18 nM. Odapipam is also a superior positron emission tomography (PET) radiotracer^[1][2].

Dopamine D₁ receptor^[1]

The metabolism of Odapipam has been studied with phenobarbital-induced rat liver microsomes. During the incubation of Odapipam, five different metabolites are formed. The electron-ionization (EI⁺) mass spectra of the metabolites indicated the formation of N-desmethyl-Odapipam, 1-hydroxy-Odapipam, the two isomers of 3′-hydroxy-Odapipam and a metabolite which is dehydrogenated in the dihydrobenzofuran moiety^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

329.82

C₁₉H₂₀ClNO₂

131796-63-9

Solid

White to off-white

OC1=C(Cl)C=C2CCN(C)C[C@H](C3=C(OCC4)C4=CC=C3)C2=C1

Room temperature in continental US; may vary elsewhere.

• [1]. Abi-Dargham A, et al. PET studies of binding competition between endogenous dopamine and the D1 radiotracer [11C]NNC 756. Synapse. 1999 May;32(2):93-109.  [Content Brief]

  [2]. Nielsen EB, et al. Dopamine receptor occupancy in vivo: behavioral correlates using NNC-112, NNC-687 and NNC-756, new selective dopamine D1 receptor antagonists. Eur J Pharmacol. 1992 Aug 14;219(1):35-44.  [Content Brief]

  [3]. J. VANGGAARD ANDERSEN, et al. Normal-phase liquid chromatography-particle-beam mass spectrometry in drug metabolism studies of the dopamine receptor antagonist Odapipam and the muscarine M1 receptor agonist Xanomeline. Xenobiotica. 1997, 27: 901-912.