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Abstract
From the absorption spectra in the ultraviolet and infrarred regions, and from the MNR spectrum, the most probable molecular structure of the 4,5-diamino-1,6-dihidro-1-methyl-2-methylthio-6-oxo-pyrimidine has been determined. The thermal stability of this substance has been studied from the D. T. A. and T. G. diagrams. The apparent acid constant of the mentioned substance has also been calculated.
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