You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-[3-[(2R)-2-ethylpiperidin-1-yl]-3-oxopropyl]-4-methyl-2-methylsulfanyl-1H-pyrimidin-6-one into molecular formula.
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C16H25N3O2S
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