You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[4-(4-benzhydrylpiperazin-1-yl)butyl]-3-sulfanylidenecyclohexa-1,5-diene-1-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C28H33N3OS
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