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 (5S)-3-methyl-9-(3-methyl-1-benzothiophene-2-carbonyl)-1-oxa-3,9-diazaspiro[4.6]undecan-2-one is given. What is its corresponding molecular formula?
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C19H22N2O3S
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