You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Can you give the molecular formula of the molecule N-[(2,4-difluorophenyl)methyl]-9-hydroxy-2-methyl-1,8-dioxospiro[3H-pyrido[1,2-a]pyrazine-4,3'-oxetane]-7-carboxamide ?
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C19H17F2N3O5
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