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 2-[2-[[(1S,5R,7R)-10,10-dimethyl-3,3-dioxo-3lambda6-thia-4-azatricyclo[5.2.1.01,5]decan-4-yl]methyl]phenyl]-2-methylpropanenitrile is given. What is its corresponding molecular formula?
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C21H28N2O2S
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