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Can you give the molecular formula of the molecule (7R,8aS)-1'-[(3,4-difluorophenyl)methyl]-7-hydroxy-2-methylspiro[6,7,8,8a-tetrahydropyrrolo[1,2-a]pyrazine-4,3'-azetidine]-1,3-dione ?
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C17H19F2N3O3
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