Structure–activity studies on the nociceptin/orphanin FQ receptor antagonist 1-benzyl-N-{3-[spiroisobenzofuran-1(3H),4′-piperidin-1-yl]propyl} pyrrolidine-2-carboxamideClaudio Trapella, Severo Salvadori, Carmela Fischetti et al.|Bioorganic & Medicinal Chemistry|2009Cited by 29