You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[2-(2-fluorophenoxy)ethylamino]-N-methyl-N-[(1R)-1,2,3,4-tetrahydronaphthalen-1-yl]acetamide into molecular formula.
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C21H25FN2O2
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