You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[(7-chloro-2H-chromen-3-yl)sulfonyl]-1-[(4-hydroxypiperidin-4-yl)methyl]piperazin-2-one by IUPAC nomenclature, provide its molecular formula.
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C19H24ClN3O5S
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