You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-N-[(4-fluoro-3-methylphenyl)methyl]-7-N-[[(3R)-1-(trifluoromethylsulfonyl)pyrrolidin-3-yl]methyl]-[1,2,4]triazolo[1,5-a]pyrimidine-5,7-dicarboxamide into molecular formula.
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C21H21F4N7O4S
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