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The review summarises data on transition metal com-The review summarises data on transition metal complexes with the so-called non-innocent ligands. The specific plexes with the so-called non-innocent ligands. The specific feature of these complexes is that the oxidation state of the central feature of these complexes is that the oxidation state of the central metal atom and the electronic structure of the ligands are metal atom and the electronic structure of the ligands are impossible to determine impossible to determine a priori a priori and unambiguously. The results and unambiguously. The results of experimental studies (spectroscopic, electrochemical, X-ray of experimental studies (spectroscopic, electrochemical, X-ray diffraction) of complexes with various non-innocent ligands are diffraction) of complexes with various non-innocent ligands are analysed. Particular attention is given to their structures and analysed. Particular attention is given to their structures and redox properties. The bibliography includes 208 references redox properties. The bibliography includes 208 references. .

This review presents the last decade of studies on the synthesis of various types of small-molecule inhibitors of the p53– Mouse double minute 2 homolog (MDM2) protein–protein interaction. The main focus is placed on synthetic approaches to such molecules, their cytotoxicity, and MDM2 binding characteristics.

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We have synthesized and characterized a panel of new binuclear mixed valence Cu(I,II) complexes containing substituted 2-alkylthio-5-arylmethylene-4H-imidazolin-4-ones with unusual structure. These complexes are shown to be cytotoxic for various cell lines. We have found that these compounds did not intercalate DNA, inhibited number of polymerases (telomerase predominantly), accumulated in the cell nucleus, and caused DNA degradation. Preliminary studies revealed that lead compound inhibited human breast adenocarcinoma growth in mice model.