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 N-[2-(diethylamino)ethyl]-7-(2-hydroxy-5-methyl-1H-indol-3-yl)-2-methyl-4,5-dihydro-1H-indole-3-carboxamide into molecular formula.
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C25H32N4O2
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