Abstract
Hydrazine hydrate reacts with warm ethanolic solutions of 1-aryl-4-methyl-4-isodithiobiurets to yield 3-amino-5-anilino-1,2,4-triazoles, but 2-ethyl-1-phenyl-2-isodithiobiuret afforded 3-anilino-5-mercapto-1,2,4-triazole.

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