中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 7-methoxy-3-octyl-2,3,4,5-tetrahydro-1H-3-benzazepine-1-ol | 1229622-16-5 | C19H31NO2 | 305.461 |
—— | 7-methoxy-3-(4-phenylbutyl)-2,3,4,5,-tetrahydro-1H-3-benzazepine-1-ol | 1232196-73-4 | C21H27NO2 | 325.451 |
—— | 7-methoxy-3-(5-phenylpentyl)-2,3,4,5-tetrahydro-1H-3-benzazepine-1-ol | 1229622-07-4 | C22H29NO2 | 339.478 |
—— | 7-methoxy-3-[3-(phenylsulfanyl)propyl]-2,3,4,5-tetrahydro-1H-3-benzazepine-1-ol | 1229622-05-2 | C20H25NO2S | 343.49 |
2,3,4,5-四氢-7-甲氧基-1H-苯并[d]氮杂卓 | 7-methoxy-2,3,4,5-tetrahydro-1H-benz[d]azepine | 50351-80-9 | C11H15NO | 177.246 |
—— | 3-(4-(4-fluorophenyl)butyl)-2,3,4,5-tetrahydro-1H-benzo[d]azepine-1,7-diol | —— | C20H24FNO2 | 329.414 |
—— | 1-(4-fluorophenyl)-4-(1-hydroxy-7-methoxy-2,3,4,5-tetrahydro-1H-3-benzazepine-3-yl)-butane-1-one | 1229622-13-2 | C21H24FNO3 | 357.425 |
—— | 1-(4-tert-butylphenyl)-4-(1-hydroxy-7-methoxy-2,3,4,5-tetrahydro-1H-3-benzazepine-3-yl)butane-1-one | 1229622-25-6 | C25H33NO3 | 395.542 |
—— | trans-7-methoxy-3-(4-phenylcyclohexyl)-2,3,4,5-tetrahydro-1H-3-benzazepine-1-ol | —— | C23H29NO2 | 351.489 |
2,3,4,5-四氢-1H-苯并[d]二氮杂卓-7-醇 | 2,3,4,5-tetrahydro-1H-3-benzazepin-7-ol | 36133-00-3 | C10H13NO | 163.219 |
—— | 3-{3-[2-(4-fluorphenyl)-5,5-dimethyl-1,3-dioxan-2-yl]propyl}-7-methoxy-2,3,4,5-tetrahydro-1H-3-benzazepine-1-ol | 1229622-12-1 | C26H34FNO4 | 443.559 |
GluN2B-enriched N-methyl-D-aspartate receptors (NMDARs) are implicated in several neurodegenerative and psychiatric diseases, such as Alzheimer’s disease. No clinically valid GluN1/2B therapeutic exists due to a lack of selective GluN2B imaging tools, and the state-of-the-art [3H]ifenprodil shows poor selectivity in drug screening. To this end, we developed a tritium-labeled form of OF-NB1, a recently reported selective GluN1/2B positron emission tomography imaging (PET) agent, with a molar activity of 1.79 GBq/µmol. The performance of [3H]OF-NB1 and [3H]ifenprodil was compared through head-to-head competitive binding experiments, using the GluN1/2B ligand CP-101,606 and the sigma-1 receptor (σ1R) ligand SA-4503. Contrary to [3H]ifenprodil, the usage of [3H]OF-NB1 differentiated between GluN1/2B and σ1R binding components. These results were corroborated by observations from PET imaging experiments in Wistar rats using the σ1R radioligand [18F]fluspidine. To unravel the binding modes of OF-NB1 and ifenprodil in GluN1/2B and σ1Rs, we performed a retrospective in silico study using a molecular operating environment. OF-NB1 maintained similar interactions to GluN1/2B as ifenprodil, but only ifenprodil successfully fitted in the σ1R pocket, thereby explaining the high GluN1/2B selectivity of OF-NB1 compared to ifenprodil. We successfully showed in a proof-of-concept study the superiority of [3H]OF-NB1 over the gold standard [3H]ifenprodil in the screening of potential GluN1/2B drug candidates.