“…Given their physical and biological properties, iron–salen complexes have been studied since 1931, and it has been established that salen complexes of Fe (III) exert anticancer effects on MCF-7 cells. Previously, we synthesized several derivatives of thiourea compounds and studied their activity in several cancer cell lines, including MCF-7, T47D, WiDr, and HeLa [ 31 , 32 , 34 ].…”