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Continue to ChatSynthesis of 4-phenylselenyl- and 4-(4-nitrophenylsulfenyl)-substituted pyrazole derivatives via electrophilic cyclization of acetylenic hydrazones - https://avesis.yyu.edu.tr/yayin/b761d6a9-4303-4a09-8b44-70c00aa4ad08/synthesis-of-4-phenylselenyl-and-4-4-nitrophenylsulfenyl-substituted-pyrazole-derivatives-via-electrophilic-cyclization-of-acetylenic-hydrazones