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-fluoro-2-[(6-oxo-1,3,4,7,8,8a-hexahydropyrrolo[1,2-a]pyrazin-2-yl)methyl]benzenecarbothioamide is given. What is its corresponding molecular formula?
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C15H18FN3OS
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