Abstract
Mono-substituted spin-labeled compounds were synthesized from Mannich reactions of dihydroquercetin with 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl, 3-amino-2,2,5,5-tetramethylpyrrolidine-1-oxyl, and 3-aminomethyl-2,2,5,5-tetramethylpyrrolidine-1-oxyl. According to preliminary data, the compounds possessed antioxidant activity and selective cytotoxicity against various tumor cells and were promising for biomedical tests including magnetic resonance tomography.
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