A structural analog of EUK 8 and EUK 134 with significantly reduced activity. Acts as a synthetic catalytic scavenger of reactive oxygen species with superoxide dismutase (SOD) and catalase mimetic activity. EUK 124 inhibits superoxide-mediated reduction of an electron acceptor (i.e., SOD mimetic activity), with an IC₅₀ value of 5.0 µM.