Abstract
Nine new ortho -( meta - and para -) substituted derivatives of 2-benzylthio-5-bromo-6-methyluracils have been prepared. EI induced mass spectral fragmentation of these compounds was investigated. Fragmentation pathways are proposed on the basis of accurate mass and metastable transitions measurements. The correlation between the intensities of the M +. and the selected fragment ions of these compounds is discussed. 13 C NMR spectra of these compounds were assigned. The data derived from EIMS and 13 C NMR spectra can be used to differentiate the isomers.
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