4,5-dichloro-6-nitro-2H-pyridazin-3-one;4,5-dichloro-6-nitro-2,3-dihydropyridazin-3-one;4,5-dichloro-6-nitro-3(2H)pyridazinone;4,5-Dichloro-6-nitropyridazin-3-ol;
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