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 (Z)-3-anthracen-9-yl-2-[(5-ethyl-1,3,4-oxadiazol-2-yl)sulfanyl]prop-2-enoic acid into molecular formula.
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C21H16N2O3S
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