4,5-dichloro-1,2-dihydro-pyridazine-3,6-dione;dichloropyridazine-3,6-diol;4,5-DICHLORO-1,2,3,6-TETRAHYDROPYRIDAZINE-3,6-DIONE;4,5-dichloropyridazine-3,6-diol;4,5-Dichlor-1,2-dihydro-pyridazin-3,6-dion;
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