You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2-bromo-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)sulfonyl]butanenitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C11H13BrN2O2S2
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