Search for "ditopic receptors" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2018, 14, 1723–1733, doi:10.3762/bjoc.14.146
Beilstein J. Org. Chem. 2011, 7, 75–81, doi:10.3762/bjoc.7.11
Beilstein J. Org. Chem. 2010, 6, No. 32, doi:10.3762/bjoc.6.32