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Mattson RJ, Catt JD, Keavy D, Sloan CP, Epperson J, Gao Q, Hodges DB, Iben L, Mahle CD, Ryan E, Yocca FD: Indanyl piperazines as melatonergic MT2 selective agents. Bioorg Med Chem Lett. 2003 Mar 24;13(6):1199-202. Optimization of a benzyl piperazine pharmacophore produced N-acyl-4-indanyl-piperazines that bind with high affinity to melatonergic MT (2) receptors. (R)-4-(2,3-dihydro-6-methoxy-1H-inden-1-yl)-N-ethyl-1-piperazine-carboxami de fumarate (13) is a water soluble, selective MT (2) agonist, which produces advances in circadian phase in rats at doses of 1-56 mg/kg that are no different from those of melatonin at 1 mg/kg. Unlike melatonin, 13 produced only weak contractile effects in rat tail artery. |
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