You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-[1-ethyl-5-[(2S,3R)-5-oxo-3-phenyl-4-propan-2-ylmorpholin-2-yl]-1,2,4-triazol-3-yl]-N-methylacetamide into molecular formula.
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C20H27N5O3
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