You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named benzyl 2-[3-(3,6-diacetyloxy-9-ethoxy-4,5-dimethylxanthen-9-yl)propanoyl-methylamino]acetate by IUPAC nomenclature, provide its molecular formula.
user
C34H37NO9
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