Abstract

The ability of 9-methylhypoxanthine (MeHyp) to form stable cluster ion was studied by electrospray ionization mass spectrometry (ESI-MS). It was found that 9-methylhypoxanthine (in contrast to hypoxanthine) forms stable magic number cluster tetramer, namely [(MeHyp)4+Na]+ ion, as detected by ESI-MS. Results obtained for alkali metals other than sodium, as well as for hypoxanthine nucleoside (inosine) are also discussed.

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