The research of Katarina Virijević is focused on the synthesis and characterization of potentially biologically active derivatives of 2-thiohydantoin, as well as on the investigation of various biological activities. The experimental part presents a detailed description of the synthesis and characterization of three different series of 2-thiohydantoin molecular hybrids, spectral and crystallographic data, as well as all methods used (biological and theoretical tests). The interaction of the newly synthesized compounds with DNA, bovine serum albumin (BSA), and human serum albumin (HSA) will also be investigated. The interactions of the obtained hybrids with DNA will be examined Uv-Vis spectrophotometrically and spectrofluorimetrically, where the binding constants and the binding method of the synthesized compounds with the DNA molecule will be determined based on the obtained results.