The present review gives an account on the synthetic routes to pyrazolo(1,5-a)(1,3,5)triazine system, which is an isostere of purine, and polyfused systems bearing this heterocy clic core. Data concerning biological activity of compounds with pyrazolo(1,5-a)(1,3,5)triazine skeleton are also discussed.
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Chui et al. (2008) studied this question.
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