Add time:07/28/2019 Source:sciencedirect.com
DNA reacted with DIBROMODULCITOL (cas 10318-26-0) in neutral solution yielded 3- and 7-alkyl substituted purines after hydrolysis at neutral pH-value at 37°C. The alkylated products were identified by mass spectrometry and by comparison of their UV absorption spectra and chromatographic properties on thin-layer chromatography (TLC) and various columns with those of the corresponding galactitylpurine derivatives obtained by synthetic route from alkylation of the appropriate nucleic bases or nucleosides. The labelled alkylpurines occurring in DNA of Yoshida tumour cells treated with [3H]dibromodulcitol in vivo were also indentified by co-chromatography of labelled DNA hydrolysate with synthetic 3- and 7-alkyl substituted purines. On the basis of the same chromatographic behaviour 3-(1-deoxy-3,6-anhydrogalactit-1-yl)adenine, 7-(1-deoxygalactit-1-yl)guanine, 7-(1-deoxy-3,6-anhydrogalactit-1-yl)guanine and 1,6-di(guanin-7-yl)-1,6-dideoxygalactitol were identified as main alkylated products in tumor cell DNA after in vivo treatment with dibromodulcitol.
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