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 (3S)-3-methyl-1-[(6-methylsulfanyl-2,3-dihydro-1,4-benzodioxin-7-yl)methyl]piperazine is given. What is its corresponding molecular formula?
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C15H22N2O2S
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