You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(2S,3S,4R,5R,6S)-5-acetamido-3,4-diacetyloxy-6-(2,4-dichlorophenoxy)oxan-2-yl]methyl acetate into molecular formula.
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C20H23Cl2NO9
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