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What is the molecular formula of the compound with this IUPAC name methyl (1R,3R,3aR,6aS)-3-butyl-1-(4-hydroxyphenyl)-4,6-dioxo-5-phenyl-1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrol-2-ium-3-carboxylate ?
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C24H27N2O5+
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