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 ethyl (5S)-5-(4-methoxyphenyl)-7-methyl-3-oxo-2-(pyridin-3-ylmethylidene)-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate into molecular formula.
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C23H21N3O4S
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