1-(3,4-Dichlorobenzyl)-3,3-dimethyl-4-(4-nitrobenzoyl)-3,4-dihydroquinoxalin-2(1H)-one;2(1H)-Quinoxalinone, 1-[(3,4-dichlorophenyl)methyl]-3,4-dihydro-3,3-dimethyl-4-(4-nitrobenzoyl)-
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