You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 3-methylsulfonyl-4,4a,5,6,7,8-hexahydro-2H-oxireno[2,3-d]isoquinoline-1a-carbonitrile into molecular formula.
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C11H16N2O3S
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