Search for "calix[6]arenes" in Full Text gives 4 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2022, 18, 190–196, doi:10.3762/bjoc.18.21
Beilstein J. Org. Chem. 2018, 14, 2112–2124, doi:10.3762/bjoc.14.186
Beilstein J. Org. Chem. 2011, 7, 329–337, doi:10.3762/bjoc.7.43
Beilstein J. Org. Chem. 2010, 6, No. 32, doi:10.3762/bjoc.6.32