2H-Pyrrol-2-one, 4-acetyl-1-(5-bromo-2-pyridinyl)-1,5-dihydro-3-hydroxy-5-(3-nitrophenyl)-;4-Acetyl-1-(5-bromopyridin-2-yl)-3-hydroxy-5-(3-nitrophenyl)-1,5-dihydro-2H-pyrrol-2-one
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