You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N'-ethyl-N'-[2-(2-fluorophenoxy)ethyl]-N-[(3-methoxyphenyl)-pyridin-2-ylmethyl]-2-methyl-N-propan-2-ylbutane-1,4-diamine into its molecular formula.
user
C31H42FN3O2
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