You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (4S)-4-(4-butoxyphenyl)-1-[(4S)-2,2-dimethyloxan-4-yl]-4,8-dihydro-2H-pyrazolo[3,4-e][1,4]thiazepine-3,7-dione into molecular formula.
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C23H31N3O4S
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