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 (3S)-3-pyridin-3-yl-8-(thiophen-3-ylmethyl)-1-oxa-8-azaspiro[4.5]decane is given. What is its corresponding molecular formula?
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C18H22N2OS
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