You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 4-[[2-[3-(2-ethoxyphenyl)prop-1-ynyl]-5-oxo-[1,3]thiazolo[3,2-a]pyridin-6-yl]methyl]benzoic acid is given. What is its corresponding molecular formula?
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C26H21NO4S
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