You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-[(S)-furan-2-yl-[4-(2-hydroxyethyl)piperazin-1-yl]methyl]-2-methyl-[1,3]thiazolo[3,2-b][1,2,4]triazol-6-ol by IUPAC nomenclature, provide its molecular formula.
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C16H21N5O3S
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