You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1E,3E)-2-(2-chlorobutyl)-1-(3,5-difluoropyridin-4-yl)-N,N-dimethyl-3-[(Z)-prop-1-enyl]hexa-1,3,5-trien-1-amine into its molecular formula.
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C20H25ClF2N2
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