You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N,N-diethyl-2-[(3S)-3-[2-methyl-5-(3-methyl-1,2-oxazol-5-yl)pyrimidin-4-yl]piperidin-1-yl]acetamide into molecular formula.
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C20H29N5O2
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