**Markus Blumberg, Karrar Al-Ameed, Erik Eiselt, Sandra Luber and Constantin Mamat**

Synthesis of Ionizable Calix[4]arenes for Chelation of Selected Divalent Cations Reprinted from: *Molecules* **2022**, *27*, 1478, doi:10.3390/molecules27051478 . . . . . . . . . . . . . . **145**
