1(2H)-Phthalazinone, 2-(1-(4-chlorobenzoyl)ethenyl)-;1(2H)-phthalazinone, 2-[1-(4-chlorobenzoyl)ethenyl]-;2-[3-(4-chlorophenyl)-3-oxoprop-1-en-2-yl]phthalazin-1(2H)-one
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