Scheme 3.
Synthesis of [1,2,4]triazolo[3,4-c][1,2,4]triazino[5,6-b]-5-N-(phenylcarbamothioyl) ethanoic acid hydrazide derivatives 30, 31 and 3-methyl-4-(propan-2-ylidene)-1H-pyrazol-5(4H)-one derivatives 34, 35.
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