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Eight lasalocid esters (Las1)–(Las8) have been synthesised and their complex formation with Mg 2+ and Ca 2+ cations has been studied by ESI MS and PM5 semiempirical method. The ESI MS spectra of the complexes have shown that Las1–8 forms stable 1:1 complexes with Mg 2+ and Ca 2+ cations. The ESI MS spectra at higher cone voltage values have revealed the m/z peaks characteristic...
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