You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (4S,5S)-5-[[(2S)-4-methyl-1-(3-methylbutylamino)-1-oxopentan-2-yl]carbamoyl]-2-oxo-1,3,2-dioxathiolane-4-carboxylic acid into molecular formula.
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C15H26N2O7S
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