You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 4-(benzenesulfonyl)-N-[(2S)-4-hydroxy-1-oxo-1-piperidin-1-ylbutan-2-yl]benzamide is given. What is its corresponding molecular formula?
user
C22H26N2O5S
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