You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-hydroxy-9-[2-[4-(2-hydroxyethyl)piperazin-1-yl]pyrimidin-5-yl]-9-oxononanamide by IUPAC nomenclature, provide its molecular formula.
user
C19H31N5O4
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