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Pyrimidine derivatives and related compounds. 4. A route for the synthesis of pyrazolo [3,4-e]-as-triazines, pyrazolo[3,4-d]pyrimidines, and pyrazolo[1,5-c]-as-triazines

✍ Scribed by Elnagdi, Mohamed H.; El-Moghayar, Mohamed R. H.; Fleita, Daizy H.; Hafez, Ebtisam A. A.; Fahmy, Sherief M.

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