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Structure−Activity Study of the Nociceptin(1−13)-NH<sub>2</sub>N-Terminal Tetrapeptide and Discovery of a Nociceptin Receptor AntagonistGirolamo Calò, Severo Salvadori, Remo Guerrini et al.|Journal of Medicinal Chemistry|1998Cited by 83
Comparison of the effects of [Phe<sup>1</sup>Ψ(CH<sub>2</sub>‐NH)Gly<sup>2</sup>]Nociceptin (1–13)NH<sub>2</sub> in rat brain, rat vas deferens and CHO cells expressing recombinant human nociceptin receptorsHirobumi Okawa, David G. Lambert, Beverley Nicol et al.|British Journal of Pharmacology|1999Cited by 80