Search for "imidazolidinone" in Full Text gives 28 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2012, 8, 1385–1392, doi:10.3762/bjoc.8.160
Beilstein J. Org. Chem. 2011, 7, 29–33, doi:10.3762/bjoc.7.5
Beilstein J. Org. Chem. 2009, 5, No. 43, doi:10.3762/bjoc.5.43