You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-ethyl-2-[3-[[[ethylamino-[2-(4-fluoro-2-methylphenyl)ethylamino]methylidene]amino]methyl]phenoxy]acetamide into its molecular formula.
user
C23H31FN4O2
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