You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [4-[2-(aminomethyl)-3-fluoroprop-2-enoxy]phenyl]-(3,4-dihydro-1H-isoquinolin-2-yl)methanone into molecular formula.
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C20H21FN2O2
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