You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-chloro-N-[2-[1-[2-(dimethylamino)ethyl]-5-oxopyrrolidin-2-yl]ethyl]-1H-indole-2-carboxamide into molecular formula.
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C19H25ClN4O2
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