You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-[4-[3-(4-ethoxyphenyl)triazolo[4,5-d]pyrimidin-7-yl]piperazin-1-yl]-2-methoxyethanone into its molecular formula.
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C19H23N7O3
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