You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name acetamide;[2-[1-(5-fluoropyridin-3-yl)ethylamino]-6-methylthieno[3,2-d]pyrimidin-4-yl]-pyrrolidin-1-ylmethanone into its molecular formula.
user
C21H25FN6O2S
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