You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1-(3-methylbut-2-enyl)spiro[1,4-azasilinane-4,1'-3,4-dihydro-2H-1-benzosiline];hydrochloride is given. What is its corresponding molecular formula?
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C18H28ClNSi
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