“…To date, many studies have been carried out on aryl OH-substituted hydrazidehydrazones (see Figure 1), covering several biological aspects, such as antimicrobial [31][32][33][34][35], antiviral [33,[36][37][38][39], anticancer [40][41][42][43], antiradical [31,44], enzyme inhibitors [40, [44][45][46][47][48][49], cytotoxicity [36,50], and photophysical activity [51,52]. Recently, Mali et al [33] and Popiołek [32] published exhaustive, comprehensive reviews on the biological activity, including antimicrobial activity, of hydrazides and their derivatives.…”