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What is the molecular formula of the compound with this IUPAC name (2R,4S,4aS)-2,4-dimethyl-2',4',6-trioxospiro[1,2,4,4a-tetrahydro-[1,4]oxazino[4,3-a]quinoline-5,5'-1,3-diazinane]-8-carboxylic acid ?
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