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 (5S)-5-methyl-3-propan-2-yl-7-pyridin-3-ylsulfonyl-6,8-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrazine is given. What is its corresponding molecular formula?
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C14H19N5O2S
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