Search for "electron-rich porphyrin" in Full Text gives 2 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2024, 20, 2954–2958, doi:10.3762/bjoc.20.248
Beilstein J. Org. Chem. 2014, 10, 1308–1316, doi:10.3762/bjoc.10.132