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 N-[(3S)-1-oxa-8-azaspiro[4.5]decan-3-yl]-N-phenylthiophene-3-carboxamide is given. What is its corresponding molecular formula?
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C19H22N2O2S
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