Antitumor activity of 4-nitropyridazine 1-oxides and related compounds for AH-13.

Abstract
Antitumor activity of 4-nitropyridazine-1-oxides and related compounds was tested with the rat ascites hepatoma AH-13 system. Among these nitro compounds, 3,6-dimethoxy-4-nitropyridazine-1-oxide (III) and 4-nitrocinnoline-1-oxide (XIII) were the most effective. 4-Nitropyridazine-1-oxide (I), 3,6-dimethyl-4-nitropyridazine-1-oxide (II) and 3-alkoxy-4-nitro-6-chloropyridazine-1-oxides (VI, VII) were effective to some extent.

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