You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (3S)-1-[(3aR,6S,6aS)-4-benzoyl-6-hydroxy-2,3,3a,5,6,6a-hexahydropyrrolo[3,2-b]pyrrol-1-yl]-3-aminohexan-2-one by IUPAC nomenclature, provide its molecular formula.
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C19H27N3O3
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