Search for "spiro-oxindole" in Full Text gives 4 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2018, 14, 2745–2770, doi:10.3762/bjoc.14.253
Beilstein J. Org. Chem. 2016, 12, 462–495, doi:10.3762/bjoc.12.48
Beilstein J. Org. Chem. 2014, 10, 163–193, doi:10.3762/bjoc.10.14
Beilstein J. Org. Chem. 2010, 6, 876–879, doi:10.3762/bjoc.6.103