You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-N-[(3R)-1-(6-aminopyrimidin-4-yl)piperidin-3-yl]-2-(3-chloro-5-fluoroanilino)-2-cyclopropylacetamide into its molecular formula.
user
C20H24ClFN6O
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