They act as antagonists for histamine H2 receptors (van der Goot et al., 1994). In addition they show anticancer (Zaharia et al., 2013; Zhao et al., 2013; Hong et al., 2015), antimicrobial (Al-Rubaie et al., 2014; Laczkowski et al., 2016; Mbaveng et al., 2016; Filipoviet al., 2017), c and xantine oxidase inhibitory activities (Smelceroviet al., c 2017). The biological activity (1,3-selenazol-2-yl)hydrazones is reasonably unexplored area of investigation: only two studies coping with anticancer (Zaharia et al., 2013; Zhao et al., 2013) and three studies dealing with antimicrobial activity (Laczkowski et al., 2016; Mbaveng et al., 2016; Filipovic et al., 2017) of (1,3-selenazol-2-yl)hydrazones happen to be published as much as now. Despite the fact that (1,3-selenazol-2yl)hydrazones are structurally related to their sulfur analogs, which are well-known as potent monoamine oxidases (MAO) A/B inhibitors (Secci et al., 2012; Carradori et al., 2018; OncCan et al., 2018; Tripathi et al., 2018) with fantastic antioxidative properties, there is no study of MAO A/B inhibition capacity of this class of selenium compounds to the most effective of our knowledge. Our recent study on pyridine-based (1,3chalcogenazole-2-yl)hydrazones revealed that selenium-based compounds exhibited reduced toxicity and superior antioxidant properties in comparison to their sulfur analogs (Filipoviet al., c 2017). Contemporary treatment of complicated multifactorial ailments, which include cancer and neurodegeneration, is transferred from improvement of single-targeting agents to simultaneous interactions with many targets by means of multi-targeting agents (MTAs) (Talevi, 2015). Each, neurodegeneration and cancer have their own molecular targets which must be viewed as for design of novel MTAs. Inside the case of neurodegeneration, monoamine oxidases (MAO) A/B are recommended as among the primary targets for design and style of novel MTAs (Ramsay et al., 2016), although novel MTAs for the therapy of cancer are focused on targets like DNA and cancer-related proteins (Fu et al., 2017). However, due to the fact oxidative tension significantly contributes for the pathogenesis of cancer and neurodegeneration, novel effective MTAs ought to possess also superior antioxidant properties (Let al., 2010; Carradori et al., 2018). Considering the fact that biological activity is influenced by the structural and molecular properties, specifically electronic properties, future prospects for design and style and development of new compounds with possible targeted biological activity might be based around the info obtained from experimental and theoretical final results. Within this work we made a focused library of 12 structurally connected benzylidene-based (1,3-selenazol-2yl)hydrazones (Figure 1) and tested their antiproliferative, antioxidative and MAO A/B inhibition properties. So as to evaluate the multi-targeting properties of investigated compounds to both, Parkinson’s disease and cancer, 59-14-3 Biological Activity attainable targets for probably the most active compounds had been recommended by the similarity ensemble method (SEA) (Keiser et al., 2007).Frontiers in Chemistry | www.frontiersin.orgJuly 2018 | Volume six | ArticleElshaflu et al.Selenazolyl-hydrazones as MAO Inhibitorsanalyzer. Elemental analyses are within .4 , confirming 95 purity. Infra-red (IR) spectra had been recorded on a Thermo Scientific Nicolet 6700 FT-IR spectrometer by the Attenuated Total Reflection (ATR) approach inside the region four,00000 cm-1 . Abbreviations employed for IR spectra: vs, quite 1956366-10-1 Autophagy powerful; s, powerful; m, medium; w, weak. The NMR spectra (1D and 2D) have been record.