Search for "naphthopyrans" in Full Text gives 4 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2021, 17, 2729–2764, doi:10.3762/bjoc.17.185
Beilstein J. Org. Chem. 2021, 17, 819–865, doi:10.3762/bjoc.17.71
Beilstein J. Org. Chem. 2016, 12, 825–834, doi:10.3762/bjoc.12.81
Beilstein J. Org. Chem. 2009, 5, No. 25, doi:10.3762/bjoc.5.25