You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-methylhexane;2-methyl-4-[5-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridin-3-yl]pyrimidine-5-carbonitrile into its molecular formula.
user
C21H24F3N5
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