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-methoxy-1-methyl-N-[2-[4-oxo-5-[[3-(trifluoromethyl)phenyl]methyl]pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]pyrazole-4-carboxamide into molecular formula.
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C21H20F3N7O3
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