Search for "fentanyl" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2019, 15, 1020–1031, doi:10.3762/bjoc.15.100
Beilstein J. Org. Chem. 2015, 11, 1425–1433, doi:10.3762/bjoc.11.154
Beilstein J. Org. Chem. 2013, 9, 2265–2319, doi:10.3762/bjoc.9.265