You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-methoxy-1-[3-(oxan-4-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-6-yl]butan-1-amine into its molecular formula.
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C13H21N5O2S
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