You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S)-8-propylsulfonyl-N-pyrimidin-2-yl-1-oxa-8-azaspiro[4.5]decan-3-amine by IUPAC nomenclature, provide its molecular formula.
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C15H24N4O3S
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