6-bromo-4h-pyrido(3,2-b)(1,4)oxazin-3-one;6-bromo-2h-pyrido(3,2-b)(1,4)oxazin-3(4h)-one

6-bromo-4h-pyrido(3,2-b)(1,4)oxazin-3-one;6-bromo-2h-pyrido(3,2-b)(1,4)oxazin-3(4h)-one

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