You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[2-(2-fluorophenyl)ethylamino]-N,N-dimethyl-1-prop-2-enyl-4,5,6,7-tetrahydroindazole-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H27FN4O
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