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 benzyl (2S,5S)-5-(3-chlorophenyl)-2-ethyl-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate is given. What is its corresponding molecular formula?
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C23H21ClN2O3S
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