You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[8-(2-methylbutan-2-yl)-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl]-N-[3-(trifluoromethyl)phenyl]acetamide into its molecular formula.
user
C22H28F3N3O3
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