4-pyridazinecarbonitrile, 5,6-bis(3,4-dichlorophenyl)-2,3-dihydro-2-(2-hydroxyethyl)-3-oxo-;5,6-Bis(3,4-dichlorophenyl)-2-(2-hydroxyethyl)-3-oxo-2,3-dihydro-4-pyridazinecarbonitrile
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