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Synthesis of 2-Aryl-4-(R-sulfanylmethyl)-3-methyl-6,7-dihydro-2H-pyrazolo[3,4-d]pyridazin-7-ones

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Spiro heterocyclization of 1H-pyrrolo[2,1-c][1,4]benzoxazine-1,2,4-triones with furazan-3,4-diamine

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