You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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3-(2-naphthalen-1-yloxyethyl)-4-oxo-2-propan-2-ylthieno[2,3-d]pyrimidine-5-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
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C22H20N2O4S
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