7-Bromo-1H-pyrido[2,3-b][1,4]oxazin-2-one;7-Bromo-2-oxo-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazine;7-Bromo-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one;
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