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A novel synthesis of pyrazolopyrimidine derivatives was reported wherein 5-amino-1-benzoyl-3-(methylthio)-1H-pyrazole-4-carbonitrile was treated with formic acid, formamide, thioacetamide, carbon disulfide, and phenylisocyanate and phenylisothiocyanate.
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Soliman et al. (2012) studied this question.
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