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-ethyl-3-(phenylmethoxymethyl)-N'-[(2-thiophen-2-yl-1,3-oxazol-4-yl)methyl]pyrrolidine-1-carboximidamide into molecular formula.
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C23H28N4O2S
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