Search for "κ-opioid receptor" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2023, 19, 991–997, doi:10.3762/bjoc.19.74
Beilstein J. Org. Chem. 2013, 9, 2916–2924, doi:10.3762/bjoc.9.328
Beilstein J. Org. Chem. 2007, 3, No. 1, doi:10.1186/1860-5397-3-1