Publications by authors named "J E Kokoszka"

A novel hybrid compound-2-(4,5-dihydro-1-imidazol-2-yl)phthalazin-1(2)-imine () was synthesized and converted into di-substituted sulfonamide derivatives - and phthalazine ring opening products-hydrazonomethylbenzonitriles -. The newly prepared compounds were characterized using elemental analyses, IR and NMR spectroscopy, as well as mass spectrometry. Single crystal X-ray diffraction data were collected for the representative compounds , , , , and .

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Four copper(II) complexes, -, derived from 1-(isoquinolin-3-yl)heteroalkyl-2-one ligands - were synthesized and characterized using an elemental analysis, IR spectroscopic data as well as single crystal X-ray diffraction data for complex . The stability of complexes - under conditions mimicking the physiological environment was estimated using UV-Vis spectrophotometry. The antiproliferative activity of both ligands - and copper(II) compounds - were evaluated using an MTT assay on four human cancer cell lines, A375 (melanoma), HepG2 (hepatoma), LS-180 (colon cancer) and T98G (glioblastoma), and a non-cancerous cell line, CCD-1059Sk (human normal skin fibroblasts).

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Introduction: Incidentaloma is an adrenal tumor detected during diagnostic imaging performed for extra‑adrenal causes. Evaluation of metanephrine concentrations in a 24‑hour urine collection can be a significant challenge in patients with multiple medications and comorbidities.

Objectives: The aim of this study was to evaluate the effect of commonly used groups of drugs on metanephrine levels in the 24‑hour urine collection.

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Umbelliferone (UMB), known as 7-hydroxycoumarin, hydrangine, or skimmetine, is a naturally occurring coumarin in the plant kingdom, mainly from the family that possesses a wide variety of pharmacological properties. In addition, the use of nanoparticles containing umbelliferone may improve anti-inflammatory or anticancer therapy. Also, its derivatives are endowed with great potential for therapeutic applications due to their broad spectrum of biological activities such as anti-inflammatory, antioxidant, neuroprotective, antipsychotic, antiepileptic, antidiabetic, antimicrobial, antiviral, and antiproliferative effects.

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A series of 2-(1-indol-2-yl)-3-acrylonitrile derivatives, -, , -, -, -, and , were synthesized as potential antitumor and antimicrobial agents. The structures of the prepared compounds were evaluated based on elemental analysis, IR, H- and NMR, as well as MS spectra. X-ray crystal analysis of the representative 2-(1-indol-2-yl)-3-acrylonitrile showed that the acrylonitrile double bond was -configured.

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