You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1Z)-1-[5-[[1-[(4-fluorophenyl)methyl]pyrrolidin-3-yl]oxymethyl]-2H-triazol-4-yl]-N,N-dimethylbuta-1,3-dien-1-amine is the IUPAC name of a molecule. Please give its molecular formula.
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C20H26FN5O
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