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  • Title: Synthesis and study of spin-labeled nitrosoureas.
    Author: Raikov Z, Todorov D, Ilarionova M, Demirov G, Tsanova T, Kafalieva D.
    Journal: Cancer Biochem Biophys; 1985 Feb; 7(4):343-8. PubMed ID: 2983881.
    Abstract:
    For the first time we have synthesized spin-labeled nitrosoureas and have studied their properties--reduction of the iminoxyl group by vitamin C leading to the formation of the corresponding hydroxylamine derivatives and degradation in the presence of an aminoradical, leading to biradicals. The ESR spectra of biradicals in methanol have nine hyperfine resonance lines. The spin-labeled nitrosoureas have shown a high antitumor activity against the L 1210 lymphoid leukemia and P 388 lymphocytic leukemia in BDF1 mice. A study of a broad range of transplantable tumors is in progress.
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